This is a Microsoft Account issue, this is not something that Xbox Support, nor a forum support agent can assist you with. In regards to this issue, if you have already tried to fill out the Microsoft Account recovery form located here and your password reset is not working because you've forgotten all security information then your last and final hope is the Microsoft Account team whom are located here.
When making a post on their forums, please make sure you are very clear in what your asking. Give them all of the information that they require, and they might be able to assist you. Unfortunately, people on this forum will not be able to with this problem.