I’m locked out of my account and can’t remember my security information

I tried logging into my hotmail account recently, and the error messaged displayed said that someone may be trying to access my account. I filled out the security form as best I could but to no avail. I must have attempted it 3 or 4 times, all over a day apart. I made the account so long ago that I don't remember my account information, but it was the first e-mail address I ever had, so a lot of my other accounts are linked to it. I spoke to Microsoft Support on twitter, who suggested I post a question here as moderators can help me access my account,