How to remove your Experian Credit Expert account
From their FAQ (https://experian.metafaq.com/help/CreditExpertBRS/Cancel_and_duration/CancelBRS):
To cancel your membership please call us on free phone 0800 561 0083 (Monday – Friday 9am until 6pm and Saturday 9am until 1pm).
Helpful Trick: Removing online data
Publicly visible text/images often aren’t properly removed even when you succeed in removing an account. Try editing or removing them manually before removing the account itself. If you’re unsure what happens to your tracks: this can be found mostly in the Terms of Service/Privacy Policy; otherwise you can always contact Experian Credit Expert and ask personally. By the way, removal requests don’t necessarily mean your data will actually be removed (e.g. due to legal obligations).
Helpful Trick: Remove third-party logins
If you signed up for Experian Credit Expert using a third-party login such as Facebook or Twitter, you probably want to revoke all access from Experian Credit Expert. Click here to find out how.