Hi. I'm Brian and I'll try to help.
Describe, please, exactly what errors you are encountering when trying to recover the account. If you can, include them here exactly as they appear on your screen. Have you seen this guidance? https://support.microsoft.com/account-billing/805e8b0d-4141-29b2-7b65-df6ff6c9ce27. Note that there is no call support for Outlook.com accounts.
The automated form you're trying to use is the only way to recover a Microsoft account and you only have one year to do so. At the end of a year, if you haven't logged in, Microsoft permanently empties the mailbox and the form can no longer be used because there will no longer be any information the robot can compare your answers against. After a second year, the account will be permanently closed with no chance of recovery and the address, too, will be permanently disabled.