A little weird as the coin does not go to the seller, it is held by transaxe for up to 16 days as an escrow purpose. All the vendor gets is a confirmation of paid order from transaxe (which is auto cancelled if not marked Sent in 3 days).
If he is saying he has received no such order confirmation, send him and transaxe the order # and request a resolution.
If he is saying he has received no such order confirmation, send him and transaxe the order # and request a resolution.