Hello,
Have you tried to complete a recovery report through Recover your account (live.com)?
Or try contact with an agent by following the steps listed in another thread: Hacked Microsoft account with altered recovery email. - Microsoft Community
Keep in mind that the Microsoft account recovery process is automated, so neither Community users nor Microsoft moderators here in the Community will be able to help with the process.
Help with the Microsoft account recovery form - Microsoft Support
I hope this information helps.
Best regards,
Karlie Weng