Getting account back after hack

I have lost my account to a hacker, and whenever i try to do the account recovery form i get a response the same minute that they dont think its me, i still have the gmail thats connected to the account but cant use that to prove that i am the owner, since the recovery mail has been moved

How can i prove that the email the account is registered under wants to change the password?

Im only writing here since i am running out of options