Managing personal Outlook.com account settings, security, and privacy
Account recovery is an online automated process, even if you are able to contact Microsoft Support, they cannot recover your account, they can only refer you to the account recovery form.
I wish I had better news for you, this forum is just a user to user forum, for security purposes, no-one here has any account access, when a Microsoft account is hacked, if the hackers change the associated data like the Email... etc., then that account is usually no longer recoverable, 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.