You can send a request to cancel the transaction. The seller clearly sells a lot of items, so they may not care about canceling one. Go to your purchase history, find the item, then go to "resolve a problem." You can request to cancel a transaction, but I haven't done it, so I don't know what the process is like. On most ebay requests, if the seller doesn't respond, they automatically rule in your favor.
It's strange that so many people want you to "**** it up" or "learn from" what is clearly a thinly-veiled scam. The seller is hoping buyers will be too timid to call him on his BS listings. In the last month he has had several complaints just like yours.