combat450

Hi all, someone called H Q Monitor asked for my pass and I gave it to him :( . I knew that I should not have, but he was acting as if he was really a mod or something and asked for my pass to verify whether this was really my account. I was wondering now if I can retrieve my hacked account. I did not set any recovery questions :(, but I can prove that the account is mine. Can someone help me and suggest something? Thanks. I hope you guys can help, because I really want my account back.