I'm using my friend's account. My original account has been hacked And I didn't noticed it because I stopped playing my xbox for a long time and started playing today but I typed my email and password and it said it wasn't good so I clicked on the can't access my account button and typed my email and it said this email doesn't exist. And I asked my friend about my account and he said that its online so apparently I've been hacked. 

What can I do?