Verified: 9 March 2026 12:15 am UK Time
Industry: Telecommunications & Broadband
Jurisdiction: United Kingdom
Primary Regulator: Ofcom
Important Safety Warning: Beware of fake customer service numbers on search engines. Only use official channels. Scammers frequently buy ads to promote fraudulent phone numbers. BT staff will never ask for your account PIN, your online portal password, or ask you to download remote desktop software to “fix your router” over the phone.
Level 1: Customer Support (Initial Complaint)
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How to complain: You can raise a complaint directly through your MyBT online portal, via live chat, or by calling their official customer service routing numbers.
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BT Customer Service & Complaints: 0800 800 150 (Free from UK landlines and mobiles)
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Alternative Dial: 0330 1234 150 (or dial 150 from a BT mobile)
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Source Verification Note: BT Complaints Procedure
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Availability: Telephone support and live chat are available Monday to Friday from 8:00 AM to 9:00 PM, and weekends/bank holidays from 8:00 AM to 8:00 PM (UK Time).
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Timeline: BT aims to resolve complaints on the first call. If they cannot, they must provide you with a specific complaint reference number to track the investigation. (Note: Under Ofcom rules, if an Openreach engineer misses an appointment or a repair is delayed beyond 2 working days, BT must issue automatic compensation credits to your bill).
Level 2: Formal Corporate Escalation (Notice of Dispute)
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Who to contact: If standard customer service cannot resolve the issue, you must formally escalate it to their central correspondence team. Send a written letter detailing your account number, a timeline of the issue, and your desired resolution. You must explicitly request a “Deadlock Letter” if they refuse your proposed resolution. Sending this via Royal Mail Signed For is highly recommended.
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Complaints Address: Customer Service Manager, BT Customer Correspondence Centre, Providence Row, Durham, DH98 1BT
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Source Verification: BT Complaints Code of Practice
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Timeline: Under Ofcom regulations, BT has a maximum of 8 weeks to issue a final resolution or a Deadlock Letter.
Level 3: Regulatory Authority (Government Ombudsman)
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Authority: Communications Ombudsman (Note: BT does not use CISAS).
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Portal/Contact: The Communications Ombudsman is the Ofcom-approved, free dispute resolution service for BT complaints. You can submit a complaint online or by email:
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Website: commsombudsman.org
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Email: enquiry@commsombudsman.org
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Phone: 0330 440 1614
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Timeline (CRITICAL): You can only refer your complaint to the Ombudsman after you receive a Deadlock Letter from BT, OR if 8 weeks have passed since your initial complaint without a resolution. You must escalate the complaint to the Ombudsman within 12 months of receiving your Deadlock Letter.
Level 4: Legal Action (Final Step)
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Pre-Litigation: Before commencing legal proceedings, UK legal protocols require you to send a formal “Letter Before Action” (LBA) to BT’s corporate legal headquarters. This letter must outline your claim, the exact legal or contractual breach, the evidence, and the financial remedy you seek, giving them a final 14 to 30 days to settle.
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Legal Address: BT Group plc, 1 Braham Street, London, E1 8EE
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Court: If the LBA fails and the Ombudsman cannot resolve it, you can file a lawsuit. For financial claims up to £10,000 in England and Wales, you can use the Money Claim Online (MCOL) portal to enter the Small Claims Track. For complex claims, you will likely need to instruct a solicitor and proceed to the County Court.
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Source Verification: Make a court claim for money (GOV.UK)
Community Action: Is BT still ignoring your broadband dropout issue or overcharging dispute? Reply below (do not share your passwords, full account numbers, or PINs), and our community will point you to the right Communications Ombudsman complaint templates!