To make a complaint there are several steps you need to go through:
Contact your private healthcare provider and tell them the details of your complaint. They should act quickly to resolve the issue and take action to stop it happening again.
If you are not happy with the response you get check if your healthcare provider is a member of the Independent Healthcare Advisory Service in England or the Welsh Independent Healthcare Association. If it is, you can contact them for more information about how to complain.
If it is not a member, the Patients Association may be able to help. Action against Medical Accidents may be able to refer you to specialist lawyers or other sources of support.