My Microsoft Hotmail account has been stolen. The hacker has changed the alternate email and security questions. How can I retrieve my account?

A couple of days ago my Hotmail account has been stolen. The hacker used my alternate email (Yahoo) which he/she also hacked to verify ownership. I tried all three options for retrieving my account. The hacker changed the alternate email obviously so I can't use that. I also cannot use the security questions as they too have been changed. I tried filling in the form twice and got an automated email saying "Unfortunately, our automated system has determined that the information you provided was not sufficient for us to validate your account ownership." I filled in recent subjects and emails of recently sent emails and even my account info but with no use. I was able to retrieve my Yahoo account and found an email from Microsoft account team providing the security code 4770230. Also, from the logs on Yahoo I found out that the hacker was accessing my account from Kuwait. My Hotmail account is my Microsoft account. I called the call center in UAE but was informed that I should use this site. For some ridiculous reason I needed to log in  to post a question which I cannot do since my account was hacked!! I was forced to create a new account just for the purpose of posting this question. My Skype is also connected with my Microsoft account now after the merging and my laptop is Windows 8 which also uses my Microsoft account. I have searched through the other questions but all of the answers ask that I do what all I already have done (alternate email, security questions, and form). Therefore I request a solution to this problem as soon as possible.