Overcharged on Energy or Broadband? Challenge It — Free

Estimated bills that bear no relation to reality? A direct debit set hundreds of pounds too high? A switch that went wrong and left you on the wrong tariff? Suppliers and providers rely on customers not pushing back. We draft a firm, rights-based complaint letter for you — completely free of charge.

Check My Bill — Free

Is Your Bill Actually Right?

Energy and broadband billing errors are among the most widespread consumer complaints in the UK. Suppliers routinely estimate usage incorrectly, set direct debits far above what is needed, and attempt to recover debt that is out of time or simply not yours. If any of the situations below sound familiar, you have grounds to complain — and we can help you do it at no cost.

Answer yes to any of these and you may have a valid complaint:

Your bill is based on an estimate rather than an actual meter reading, and the estimate appears significantly too high.
Your energy supplier is trying to recover charges for energy used more than 12 months ago (likely against Ofgem's back-billing rules).
You switched supplier but ended up on the wrong tariff, or your switch was delayed and you were charged more than expected in the interim.
Your direct debit was raised to a level that cannot be justified by your actual or projected usage.
Your broadband or mobile provider raised prices mid-contract and you were not given the opportunity to exit penalty-free.
Speeds or service quality fell significantly short of what was promised at the point of sale.
An engineer missed a booked appointment or your new service was connected late, and you received no automatic compensation.
You are being chased for a debt you do not recognise or that relates to a previous occupant of your address.

Common Energy & Broadband Complaints

These are the billing and service issues we most frequently help UK consumers challenge. Each has a recognised basis under Ofgem rules, Ofcom regulations, or consumer law.

1. Incorrect or Estimated Bills

Suppliers are required to use actual meter readings where possible and must take all reasonable steps to obtain them. Persistently estimated bills that overstate your usage result in money sitting unnecessarily in your supplier's account. You are entitled to a corrected bill based on a real reading at any time, and any overcharged amount must be refunded promptly. If your smart meter is not sending readings, the supplier — not you — is responsible for fixing that.

2. Back-Billing Beyond 12 Months

Under Ofgem's back-billing rules, a domestic energy supplier cannot charge you for gas or electricity used more than 12 months before the date the corrected bill was issued, provided the underbilling was not caused by your actions (such as tampering with the meter or deliberately providing false readings). If your supplier is demanding payment for energy used over a year ago and the error was on their side, you can challenge the historic element of the debt — and in most cases it must be written off.

3. Failed or Delayed Energy Switch

The Energy Switch Guarantee means your switch should complete within five working days. If it takes longer, or if you end up on the wrong tariff because of a supplier error, you are entitled to compensation. Common problems include being billed at the old supplier's standard variable tariff after the switch date, final bills from the losing supplier that double-count usage, and objections by the old supplier that were not properly notified to you. All are grounds for a formal complaint.

4. Direct Debit Set Too High

Suppliers may review and adjust direct debits to reflect projected usage, but the amount must be fair and proportionate. Regulators expect suppliers to base direct debits on actual consumption data and to ensure customers are not building up excessive credit balances without being offered a refund. If your account is consistently in significant credit and your supplier refuses to reduce your payments or return the balance, this is challengeable under Ofgem's billing rules and your supplier's own licence conditions.

5. Broadband Mid-Contract Price Rises

Following Ofcom rules that came into force in January 2024, broadband and phone providers must state the exact price you will pay throughout your contract — not a price linked to a variable index. If your provider attempts to raise prices mid-contract in a way that was not clearly set out at the time of sale, you have the right to exit the contract penalty-free (without paying an early termination charge). Providers who fail to offer this exit right are in breach of their Ofcom obligations.

6. Broadband Speeds Far Below What Was Promised

Under Ofcom's Broadband Speeds Code of Practice, providers must give you a minimum guaranteed speed at the point of sale. If your actual speeds consistently fall below that guaranteed minimum and your provider cannot fix the problem within 30 days of you notifying them, you have the right to exit your contract without penalty. You may also be entitled to a credit for the period of underperformance. Keep records of speed test results (date, time, result) to support your complaint.

7. Missed Appointments and Connection Delays

Ofcom's Automatic Compensation scheme (in force since April 2019 for participating providers, including BT, Sky, TalkTalk, Virgin Media, and others) requires providers to pay compensation automatically — without you having to ask — when: a new service is not activated on the agreed start date; an engineer misses a scheduled appointment without notice; or a fault is not repaired within two working days. If you have not received this compensation, you are entitled to claim it and the provider should pay it without argument.

8. Debt That Is Not Yours

Energy debts follow the address, not the person, which means suppliers sometimes pursue new occupants or account holders for a previous resident's unpaid balance. They may also attempt to collect debts that are statute-barred (over six years old in England and Wales). If you are being chased for energy use that occurred before you moved in, or for a balance you have never incurred, the debt is not yours and you are entitled to have your account corrected — in writing, clearly and promptly.

Your Rights as an Energy & Broadband Customer

Energy: Ofgem Rules and Your Supplier's Licence Conditions

Domestic energy suppliers hold licences granted by Ofgem, the energy regulator. Those licences impose detailed obligations on billing accuracy, switching timescales, and debt recovery. Key protections include:

12-month back-billing limit: Suppliers cannot charge for energy used more than 12 months before a corrected bill is issued, where the undercharging was their fault.
Accurate billing: Suppliers must take all reasonable steps to bill on actual reads and correct errors promptly.
Direct debit fairness: Direct debits must reflect reasonably projected usage. Suppliers must notify you before changing the amount and must offer refunds of significant credit balances.
Switching guarantee: Domestic switches should complete within five working days. Compensation is due when they do not.
Complaint handling: Suppliers must acknowledge complaints promptly. If your complaint is not resolved within 8 weeks, or if the supplier issues a "deadlock" letter, you can escalate to the Energy Ombudsman (Ombudsman Services: Energy) free of charge.

Broadband & Phone: Ofcom Regulations

Ofcom regulates UK communications providers. Relevant protections include:

Price transparency (from January 2024): Providers must state a fixed or clearly defined price at the point of sale. Mid-contract rises beyond what was disclosed give you the right to exit penalty-free.
Minimum guaranteed speed: Providers in the Broadband Speeds Code of Practice must give you a minimum guaranteed speed. Persistent failure to meet it gives you exit rights after 30 days.
Automatic Compensation: Compensation for missed engineer appointments, delayed activation, and unrepaired faults must be paid automatically by scheme members.
Complaint escalation: If your complaint is unresolved after 8 weeks, or if the provider issues a deadlock letter, you can refer to an approved Alternative Dispute Resolution (ADR) scheme — either the Communications Ombudsman or CISAS (Communications & Internet Services Adjudication Scheme), depending on your provider.

Consumer Rights Act 2015

Energy supply and broadband are services contracts. Under the Consumer Rights Act 2015, every service must be performed with reasonable care and skill, at the price agreed, and within a reasonable time. Where a service falls short of these standards, you are entitled to a repeat performance or, where that is not possible, a price reduction. This applies to ongoing service quality issues, billing errors, and problems arising from failed switches or installations.

How Octave Resolution Services Helps

A Firm Complaint Letter — Completely Free

We are not a law firm and we do not provide legal advice. What we do is draft a clear, professionally structured complaint letter on your behalf that gives your challenge the strongest possible foundation. Our letters:

Cite the relevant rules — Ofgem back-billing limits, switching guarantees, and direct debit obligations for energy complaints; Ofcom price transparency rules, Automatic Compensation entitlements, and minimum speed guarantees for broadband and phone complaints.
Reference your Consumer Rights Act 2015 protections — reasonable care and skill, agreed price, and performance within a reasonable time.
Identify the correct escalation route — the Energy Ombudsman for energy complaints unresolved after 8 weeks, and the Communications Ombudsman or CISAS for broadband and phone complaints.
Set a clear deadline — typically 14 days — with formal notice that you are aware of your right to escalate to the ombudsman or ADR scheme at no cost to you.
Address the specific facts of your case — whether that is the back-billing period, the dates of a failed switch, the speed test records, or the debt you are disputing.

Every letter is tailored to the specifics of your situation. The service is 100% free.

A Note on Keeping Records

The most useful thing you can do before submitting a complaint is gather the evidence available to you: meter readings with dates, screenshots of your online account, screenshots of speed test results (include the date, time, and result), copies of correspondence, and records of any telephone calls (note the date, time, name of the agent, and what was said). This evidence significantly strengthens your letter and is often decisive when the supplier reviews your complaint.

Check My Bill — Free

Don't Accept an Unfair Bill — Act Now

Complaint deadlines matter: you have 8 weeks from your complaint to the supplier before the ombudsman route opens. The sooner you complain in writing, the sooner that clock starts. Our letters are drafted within 48 hours of receiving your details, at no charge.

How the Process Works

Step 1 — Free assessment (2 minutes): Tell us what happened — the charge, the supplier or provider, and what evidence you have.
Step 2 — We review your situation (within 24 hours): We identify the strongest grounds for complaint under Ofgem rules, Ofcom regulations, or consumer law.
Step 3 — Complaint letter drafted (within 48 hours): A tailored, firm letter citing the relevant rules and requesting a specific remedy is prepared for you.
Step 4 — You send the letter: We provide clear instructions for submitting the complaint by email and, where useful, recorded post.
Step 5 — Escalation support if needed: If the supplier or provider does not resolve the matter within 8 weeks, we advise on referring to the Energy Ombudsman, the Communications Ombudsman, or CISAS — all free to you.

We are not a law firm and we do not provide legal advice. We are a free complaint letter drafting service. We cannot guarantee any particular outcome. Results depend on the specific facts of your case and the decisions of the supplier, provider, or ombudsman.

Check My Bill — Free

Energy & Broadband Complaints — FAQs

Common questions about energy and broadband billing complaints. This information is general guidance only and does not constitute legal advice.

Can my supplier back-bill me for more than 12 months?

In most cases, no. Under Ofgem's back-billing rules, a domestic energy supplier cannot charge you for gas or electricity used more than 12 months before the date the corrected bill is issued — provided the underbilling was not your fault (for example, you did not tamper with the meter or deliberately supply false readings). If your supplier is seeking to recover charges for energy used over a year ago and the error was on their side, you can formally challenge the historic element of the debt. In most cases it must be written off entirely.

My direct debit seems too high — can I challenge it?

Yes. Your direct debit should reflect your actual or reasonably projected usage — not serve as a way for your supplier to hold large amounts of your money. Ofgem expects suppliers to base direct debits on real consumption data and to offer refunds when accounts build up significant credit balances. If your account is consistently in substantial credit and your supplier refuses to reduce payments or return the surplus, you have a valid basis to complain. Ask your supplier to review the direct debit in writing, request a refund of any credit owed, and if they refuse, we can draft a formal complaint letter citing the relevant Ofgem billing obligations.

A switch went wrong — what can I do?

The Energy Switch Guarantee requires your switch to complete within five working days. If it took longer, left you on the wrong tariff, or resulted in duplicate billing from two suppliers, you are entitled to compensation and to have your account corrected. Contact the new supplier in the first instance, as they are responsible for managing the switch process. Keep records of your meter readings on the switch date — this is your most important evidence. If the supplier cannot resolve the matter, a formal complaint citing the switching guarantee is the next step. Compensation may be owed automatically in some circumstances.

My broadband price went up mid-contract — can I leave?

Often yes, without paying an early termination charge. Under Ofcom rules in force from January 2024, broadband and phone providers must state the exact price you will pay throughout your contract at the point of sale. If your provider raises prices mid-contract in a way that was not clearly and explicitly set out when you signed up, you have the right to exit penalty-free. Check your original contract terms carefully. If the price rise was not disclosed at the time of sale, write to your provider asserting your right to exit under the Ofcom rules. We can draft that letter for you at no charge.

How do I escalate if the supplier won't fix it?

If your complaint to the supplier or provider has been open for 8 weeks without resolution — or if they issue a "deadlock" letter confirming they cannot agree a resolution — you can escalate at no cost to you:

Energy complaints: refer to the Energy Ombudsman (Ombudsman Services: Energy). Their decisions are binding on the supplier.
Broadband and phone complaints: refer to the Communications Ombudsman or CISAS (Communications & Internet Services Adjudication Scheme), depending on which scheme your provider belongs to. Both schemes are free to use and their decisions are binding.

Keep a copy of your original complaint letter and all correspondence — you will need this when you submit to the ombudsman or ADR scheme.

Is your complaint letter service free?

Yes, entirely. Octave Resolution Services drafts complaint letters for energy and broadband billing disputes at no charge. There are no hidden fees, no subscription, and no success commission. We are not a law firm and do not provide legal advice. We provide a free complaint letter drafting service to help consumers challenge unfair charges, back-billing, failed switches, and other billing problems using the correct regulatory framework. You can get started by telling us what happened via our free assessment tool.

Read our full energy & broadband complaint guide →