Hotmail hacked and now blocked and I can’t access the security code- how do I get my account back?!

My hotmail was hacked, so it was automatically blocked. Hotmail has automatically sent a security code to an old email address I used to have that has now expired. I tried to get the code sent to my mobile phone but my phone number has changed since I registered with hotmail, and it says the number needs to be matching. How can I get my account back?!