Account recovery is an automated online process, even if you can contact Microsoft Support, they cannot recover your account, they will just refer you to the account recovery form.
I wish I had better news, when a Microsoft account is hacked, if the hackers change the associated data like the 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 and Mojang indicate if the Microsoft account cannot be recovered, then the Minecraft account is lost..