if this is true please quickly open a scam accusation and post all evidenced you have, so df will tag him, this will let other users know he is a scammers so they will not deal whit him anymore
Post the accusation in this forum: https://bitcointalk.org/index.php?board=83.0
And use the proper format when you do it some example:
[b][color=black]What happened:: [/color][/b]
[b][color=black]Scammers Profile Link: [/color][/b]
[b][color=black]Reference Link: [/color][/b]
[b][color=black]Amount Scammed: [/color][/b]
[b][color=black]Payment Method: [/color][/b]
[b][color=black]Proof of Payment: [/color][/b]
[b][color=black]PM/Chat Logs: [/color][/b]
[b][color=black]Additional Notes: [/color][/b]