Hacked

I don't know how to report so i will write at here. I am not good at English. Last year, My first account 'kevin245' was hacked. I thought i typed my password wrong but my account was online so i thought my account got hacked. I was really mad but i had to focus on the study, so i just ignore it until now. However, i sent him the friend request 2months ago, today he got mine so i told him "why did you hacked my account? I spend more 200dollors. Can you give it back?" but he just unfriend me. Please help me to get my account back. I am really mad at him I want to get my account back.