Dudez, both sides are jez fired up right now.
I believe that the buyer is angry cuz of that "feature" that he didn't expect or want, while the seller is jez angry that the buyer is asking for a refund for an item that he doesn't believe is spoilt, and still the buyer is leaving him no space to retreat even though he has done almost everything he can.

Cut Infinity some slack guys, Y not give him some time period, if Mediaplex doesn't reply by then, then settle for a refund or smthing?
Since the buyer can't be expected to wait forever, while the seller can't be blamed for waiting for Mediaplex to reply.