Hi! Sorry to hear that you have trouble with this situation, visit the next link to get help on how to fill the Microsoft account recovery form successfully:
If you can't because the account information was changed, please fill out this form https://aka.ms/recovermyaccount
This is a form you can fill out that will go to a team specially equipped to handle scenarios like this, you should get an email response within 4 hours. The team on the other end will help work through this situation.