you can ask me to send you screenshot of any part of this conversation. You can see how professional cheater he is. can someone tell me how to report about him so that no one else get cheated by him.
If you are really sure that OP have cheated you and you have some undoubted evidences; you can create a thread at https://bitcointalk.org/index.php?board=83.0 but be ready to say the truth otherwise the tide might move against you.