Hi, I'm John!
I understand how important your account is to you, so I’m going to be honest. If the email address has been changed and two-factor authentication has been enabled by the hacker, unfortunately, the account may no longer be recoverable.
Just to confirm:
- Try searching for the account using these steps from Microsoft: https://support.microsoft.com/account-billing/forgotten-your-microsoft-account-username-b2049472-3b8f-27d3-61c6-67a668453f4c
- Click on "Search" and follow the instructions provided.
If you receive any error messages, such as “account doesn’t exist” or anything else, please let me know.