I’ve forgotten my password to my email which is not blocked and have no access to linked emails.

I've changed and forgotten my password on my email account I've had for over 6 years *** Email address is removed for privacy *** and can't access it anymore. I've tried too many times guessing it and it's been blocked. Tried sending reset emails but those accounts are parent emails and are not accessible anymore. Also have tried filling out the questionnaire survey filling out as much information as possible but wasn't successful. I can provide old passwords, recent emails, names of private folders, linked mobile phone number to prove it's my account.

I've made this account *** Email address is removed for privacy *** as a temporary one for contact.

Any help would be greatly appreciated, thanks.