Cannot update proofs

I have been having trouble signing into my gamertag due to my email *** Email address is removed for privacy *** being no longer in existence. I have tried all of the troubleshooting options and spoken with xbox support who have directed me here after they tried to help me. I have entered the email and password for the microsoft account associated with my gamertag but it just gives me an error saying there is something wrong with my credentials. When I go to account.live.com it says somebody may be using my account; I have tried everything and filled out the questionnaire which led me back to account.live.com trying to reset my password, but the email it wants to send the password reset to is the *** Email address is removed for privacy *** email that no longer exists. I want to associate my gamertag ShrillLight with the email *** Email address is removed for privacy *** so I can access my gamertag. Is there anything I can do?