Email the seller with a detailed confirmation of what you think you ordered, how much it will cost, expected cost of shipping, and your correct shipping address. Remind them of the date you expect to receive it. Ask them to reply so you know there are no misunderstandings. In the past two years, at least a dozen eBay and other auction sellers with what appeared to be good feedback have been under criminal investigation for fraud, and many more probably should be. Experienced eBay buyers and sellers know that too large a percentage of ebay customers do not bother to leave feedback at all, and the feedback that is left is often suspect.
Dishonest people tell lies.
Dishonest ebay sellers are not above using multiple ebay identies to leave positive feedback about their own auctions, and there have been many instances of ebay users with a grudge leaving bad feedback just because they are not very nice. Sellers and buyers are only allowed ONE response to negative feedback. I feel really bad about the whole thing, and I apologized, of course, but that doesn't make it any easier for the seller who didn't get his money when he wanted it. More than one reputable business or buyer has suffered because the person who burned them has left a second response they could not answer via the feedback process. I look at the seller's website, and always try to pay with a credit card using Paypal.