Hello BR,
Welcome to Microsoft Q&A forum.
It's unfortunate to hear that your account has been hacked and the hacker has changed the login email. Usually, when the log in email has been changed, the account for most of the time is not recoverable. Also, this is a user-to-user support forum. Moderators, contributors including external Microsoft employees cannot directly intervene in Microsoft product features or access back-end systems. Our role is limited to providing technical guidance on reported issues, requests, or ideas. In this case, you can still try to submit a recovery form at aka.ms/recovermyaccount. If that still fails, unfortunately there I nothing more I can do. Thank you for your understanding.