I'm sorry to hear that you're experiencing this issue. I'm happy to help.
What is the exact error message you receive when trying to log in to your account?
To recover a hacked account, please visit the link below and follow the suggested steps: https://support.microsoft.com/account-billing/how-to-recover-a-hacked-or-compromised-microsoft-account-24ca907d-bcdf-a44b-4656-47f0cd89c245
The link provides comprehensive steps to recover a hacked account and also gives you the option to chat with Microsoft Support as a last resort.
Also, please fill out the account recovery form. For the link and instructions, refer to step 3 in the link below.
Help with the Microsoft account recovery form: