Bill and account complaints
If your complaint is relating to your bill and account, you can either contact us through webchat, call us or write to us.
Message us on WhatsApp, so you can get on with your day and respond at your pace. Available Monday-Friday 8am-8pm, Saturday 8am-6pm, and Sunday 8am-5pm.
You can call us on 0800 980 8800 Monday to Friday 8am to 8pm or Saturday 8am to 6pm.
Write to us
Send us a letter to: Thames Water, PO Box 436, Swindon, SN38 1TU. Please include your name, address, account number, phone number and the best time to contact you. We'll be in touch via phone or letter within 10 working days of receiving your complaint.