Blocked unable to verify

My main email address (*** Email address is removed for privacy ***) began to not recognise my password so I got apassword reset email to this account, so I've changed password and logged in. Now I'm told that someone else has been using my account so I must verify that Iam myself. The email offerred is an old one that I can't remember anything about so I tried the form. 3 tries at it and each have been unsuccessful. Not sure what I can do differently here to get my account unsuspended. Cursing my younger self for whatever personal details I entered that must've been incorrect.