Hey there! Nice to meet you!
There is a possibility that the same hacker repeatedly tried to sign in to your account, which triggered the system to detect multiple failed sign-in attempts or an unusual login pattern and resulted in the account being temporarily blocked.
It is also possible that the account lock keeps resetting. You will need to wait for the account lock to expire before you can successfully reset your password.
Since you mentioned that you have already waited 48 hours and the problem persists, you may need to wait a longer period, exactly up to a week, before performing another password reset, as stated on the official Microsoft website:
Important: Please make sure not to attempt to sign in or reset the password during this timeframe (one whole week), as this may reset the lock period.
Once you have regained access to your account, 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 understanding. Please let me know if you need anything else.
Best regards
Darhyl