Hey there! Nice to meet you!
If you have access to your account's verification methods (recovery email or phone number), you can reset the password on account.microsoft.com > click Forgot Password > provide the verification codes > then reset the password.
If you do not have access to the verification methods for a password reset, the only way to recover the account is through the account recovery web form: https://account.live.com/acsr
Important: If you have an active 2FA, ACSR will inform you that your recovery request will be ignored. If you only receive a message that the recovery request is either successful or indicates insufficient information, this means that 2FA is disabled.
You'll need to keep trying until you're verified by Microsoft, and you can do this up to 2 times every 24 hours.
If your Microsoft account recovery request was not granted, please review this link for tips on improving your chances of a successful recovery: https://support.microsoft.com/office/dc56c3e3-dff0-4ed5-8edb-60290eea6b53
Please be advised that Microsoft Support will not be able to grant you access to your account.
Once you have regained access to your account, kindly secure your account by enabling the two-step verification feature and ensure that your verification methods are updated on account.microsoft.com > Security > Manage how I sign in
Lastly, I recommend following the guide from this thread to prevent unauthorized logins: https://learn.microsoft.com/answers/questions/4049625/someone-is-repeatedly-trying-to-access-or-hack-my?forum=windows-all&referrer=answers
Thank you for your understanding.
Best regards,
Darhyl