Egads.
Roger is 100% correct. Never thought I'd write that (grin).
EBay is a risk/reward system, like any auction anywhere. You don't get to handle the merchandise beforehand - there is an 'as is' philosophy in place unless the seller actively comitted fraud. The risk is that you might not get what you thought you were getting. The reward is that you might get a better deal on something than you would at retail. It's as simple as that.
Now, what happened here appears to be either fraud or a seriously stupid seller - my judgement leads me to believe it could be either in the absence of more information, but I'd lean towards dishonesty or heavy-duty greed in this case.
The advice given was good - first, contact the seller, describe the problem, and ask for a refund.
If the seller refuses, or even waffles, take it to paypal / ebay. You have at least 30 days to report to your credit card company, so use that as a last ditch. Going to the big guns up front only screws the system up a bit.
In my experience, ebay/paypal favor the buyer by a long shot (I'll spare you my details as a seller). You should get your money back - if the seller has it. If not, you may have to go the credit card company, assuming you paid by credit card.
I noticed, as did others, that you placed a negative feedback already. That's probably a mistake. It was a hammer you held over the seller's head - now you've shot your bolt and can no longer threaten to harm their reputation - you've already done it.
Ebay tries to get you to think once, twice, three times before leaving a neg - but allows you to do it if you insist, of course. Kind of wondering why you went to the big guns up front.
Sorry you got burned, of course.
Best Regards,
Bill Mattocks