Hi, I'm Bernard. I'm happy to help!
The Microsoft account recovery form is one of the last and most effective options for recovering your account when other verification methods are unavailable. To help prove that you are the owner of the account, I recommend that you resubmit the form and provide as accurate and detailed information as possible. The more accurate information you provide, the higher the chances of your request being successfully verified.
However, if the issue persists, you can reach out to Microsoft Accounts and Billing support by following these steps:
Go to this link: https://support.microsoft.com/home/contact
Type your problem in the search bar and press Enter.
Scroll down to the bottom and select the blue "Contact Support" button.