If more than 8 weeks from the date of your complaint has past and you haven’t received a final response, or you are dissatisfied with the final response you have received (at any stage of the process) you can write to:
Financial Ombudsman Service (FOS)
South Quay Plaza
183 Marsh Wall
You must refer your complaint to the Financial Ombudsman within 6 months of the date on the final response.