My account got hacked and i dont know how to get it back

So ill start of saying that resontly my very old warthunder account was hacked and taken away from me the account had top tier on almost every nation and this seems like the only place i can go.
The google account it was signed up under was hacked i have proof that this is my account multiple pictures medal clips + the old email and password to it but now the hacker has taken it all and added every form of security just really want my account back im wishing for the account to be transfered to a diffrent email altho its unlikely i wish you can do that i will provide proof its my account just want to finaly get access to it again

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