Hey Gary!
Nice to meet you! I'm Darhyl, an Independent Advisor.
The only way to recover a hacked account is through the official Microsoft website: https://support.microsoft.com/account-billing/how-to-recover-a-hacked-or-compromised-microsoft-account-24ca907d-bcdf-a44b-4656-47f0cd89c245
If it doesn't work, and if the email address has been replaced by the hacker, I'm afraid there is no other working method to recover the Microsoft account, and Microsoft Support cannot help either.
Thank you for your kindness and understanding.
Best regards,
Darhyl