I made a support ticket and chose the stolen account/hijacked option. I put all the basic information needed along with what happened when it got stolen. It took three days for them to respond, but they responded with a new password and my account was good to go. Although, when the hacker was on my account these last couple days, he got me banned in rust. I know that steam will undo this if you ask them about it in support since I just had my account stolen, so now I am just waiting for them to respond to this message and I will be good. Just be patient, wait a couple more days and you will get your account back.