Verified: 13 March 2026 10:35 am UK Time
Industry: Retail, Supermarkets, Mobile & Banking
Jurisdiction: United Kingdom
Primary Regulators: Competition and Markets Authority (CMA), Financial Conduct Authority (FCA), & 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. Tesco staff will never ask for your account PIN, your Clubcard password, or ask you to move money to a “safe account” over the phone.
Level 1: Customer Support (Initial Complaint)
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How to complain: You can raise a complaint via their online Live Chat (Little Helper), WhatsApp, or by calling their dedicated routing numbers based on your issue:
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In-Store Purchases & General: 0800 505 555
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Online Groceries & Deliveries: 0800 323 4040
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Tesco Mobile: 0345 301 4455
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Tesco Bank (Credit Cards): 0345 300 4278
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Source Verification Note: Tesco Help & Contact Portal
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Availability: General retail phone lines are typically open Monday to Saturday from 8:00 AM to 8:00 PM, and Sunday from 9:00 AM to 6:00 PM (UK Time). Online grocery lines stay open later.
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Timeline: Tesco aims to resolve initial retail complaints within 24 to 48 hours.
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 in writing. Send a letter detailing your receipt/order number, a timeline of the issue, and your desired resolution. You must explicitly request a “Deadlock Letter” if they refuse your proposed resolution.
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General Retail Complaints Address: Tesco Customer Service Centre, Baird Avenue, Dundee, DD1 9NF
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Timeline: Under UK consumer law guidelines, Tesco has a maximum of 8 weeks to issue a final resolution or a Deadlock Letter.
Level 3: Regulatory Authority (Ombudsman & Financial Routes)
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Authority: Varies strictly by the product you purchased.
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The Reality: Tesco is a massive conglomerate. Your escalation path depends entirely on the division you are dealing with:
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Tesco Supermarkets (General Retail): There is no statutory retail ombudsman. If Tesco refuses to refund you for faulty goods or undelivered groceries, you must contact your bank and claim a breach of contract under Section 75 of the Consumer Credit Act (for credit cards) or request a Chargeback (for debit cards).
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Tesco Mobile: Escalate to the Communications Ombudsman for a legally binding ruling. (Website: commsombudsman.org)
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Tesco Bank: Escalate to the Financial Ombudsman Service (FOS) for a legally binding ruling. (Website: financial-ombudsman.org.uk)
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Timeline (CRITICAL): For Mobile and Bank disputes, you can only refer your complaint to the Ombudsman after you receive a Deadlock Letter, OR if 8 weeks have passed since your initial formal complaint.
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). You must address it to their corporate legal headquarters. (Note: Tesco Bank and Tesco Mobile are separate legal entities, but for general retail, use the address below).
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Legal Address (Retail): Legal Department, Tesco Stores Limited, Tesco House, Shire Park, Kestrel Way, Welwyn Garden City, AL7 1GA
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Court: If the LBA fails and your bank/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.
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Source Verification: Make a court claim for money (GOV.UK)
Community Action: Is Tesco still refusing to refund your missing online grocery delivery or ignoring a Tesco Mobile billing dispute? Reply below (do not share your passwords, full receipt numbers, or PINs), and our community will point you to the right Section 75, Comms Ombudsman, or Small Claims Court templates!