Can you prove that the deal was actually for Depth strider boots and not for what he gave you? You didn't include proof of both of you agreeing to the full deal.
Actually, I did not. But then I remembered that I should have done it but I forgot it. Would have liked to get him banned for this. but since I forgot it becomes probably nothing.
You had more time to supply evidence. When you feel you have the right evidence, report him. - Closing