Please be advised that Microsoft Support will not be able to assist you with manual recovery, unblock, and escalation for this case, as stated in this article, that they are not permitted to send password resets, access, or even change any details on the account:
Lastly, if your email address that has been removed by the hacker is a Microsoft domain, such as Hotmail, Outlook, MSN, Live, it can no longer be linked to any Microsoft accounts again.
You may check this link for reference: https://support.microsoft.com/office/add-or-remove-an-email-alias-in-outlook-com-459b1989-356d-40fa-a689-8f285b13f1f2
Best regards,
Darhyl