I have recently purchased 0.90 tcw diamond stud earrings. Except for the clarity (VS2), the seller (jeweler from a local jewelry district shop) lied about everything (color, and size.) He told me they were G color, they turned out to be J/K. The size was off as well. They are not 0.90 tcw, but only 0.85 tcw. What to do when he refuses to refund? Is there a place to file a complaint?