Complaint Review: DVDs 123

Several months ago, I made two selling orders with DVDs123.com. The first order I made several days before the second one, the first one was 5 DVDs I was sending to them for cash, the next was 4. Since I made the orders within a few days, I just sent them all in one box with one purchase order on the box, the other was inside the box with the DVDs. Upon receiving the box, they sent me a check for the second order, about $27, but they didn't pay me for the first, which was about $50. After several emails, they insisted that it must have been another box, and were rather unhelpful. Since they paid me for one order, they must have received the order, but will not answer my emails anymore and deleted my guestbook entry on their site that was a warning to people about their business ethics. At any rate, I would like to see my money, but if not, at least see justice served.