I sold a diamond on ebay for 8,602.00 the buyer got the diamond with cert. and the made a claim against me saying that it was not as described and so PayPal made him send it back and when I got the package it was a class thing in the shape of a diamond and not even the certification with it or any of the other paperwork that I sent to the buyerand he got a full refund and he also still has the diamond and certification and paperwork that I sent to him what do I need to do