I wish I had better news, but when a Microsoft account is hacked, if the hackers change the associated Email, then that account is usually no longer recoverable, this forum is just a user to user account and no-one here has any account access, try using the process they provide on this link to recover a hacked account, if this process is not successful, sadly, that account cannot be recovered.
Sadly, if you are unable to recover the Microsoft account, Mojang indicated the associated Minecraft account is not recoverable.