It looks like someone else might be using your account

I have an issue where I am trying to sign into my account on login.live.com using an E-mail that I no longer have access to. However, I have an alternate E-mail on the account that I have been using to be in contact with the Microsoft team. I have sent multiple account recovery forms, but have been unable to "provide sufficient amount of information". I have had this account for 6+ years, and due to recent security updates I have been unable to verify the original email of the account since I do no have access to it. I have been on the phone and in chat messenger with Microsoft, and they are still unable to resolve the issue. All they seem to do is have to submit multiple account recovery requests till I reach my limit for the day, and tell me to try again in 24 hours. Is there anything I can do to resolve this issue? I would really like to just  simply verify my account using my Alternate E-mail on my account so I can continue to use it.