The One Call insurance claims team is easily accessible to handle any of your complaints about the services at the One Call insurance claims phone number 0203 738 7300 from Mon- Fri 9 am- 5:30 pm. If you wish to send in the complaint in writing, it can be sent to the following One Call insurance complaint postal address
The Complaints Handling Manager, One Call, Claims Limited, 1 Carolina Court, Doncaster, DN4 5RA
If you are not happy with the given decision, or the issue has not been resolved within 8 weeks of receiving the complaint, you can raise the issue to Financial Ombudsman Service (FOS) for review. FOS can be contacted by post at the address: The Financial Ombudsman Service, Exchange Tower, London, E14 9SR. More details can be checked via the page.