My account got hacked and was lost

My account got hacked in late may early June, and I wasn't able to recover it afterwards. The account was linked with google account which was hacked first, luckily I was able to recover the said google account, but I wasn't able to recover the Microsoft account as the hacker has changed the email and everything. I still have the Microsoft authenticator app so I am able to see that the entire email has been changed into something else. Is there any way of recovering this account? I have tried sending a form with Microsoft account recovery form like several times, but I have not gotten any response back. Could there be any other way of contacting support for help or do I assume the account is lost.