The first thing you do is contact the seller.
If the seller doesn't co operate click here to open an "Item Not as Described Dispute"
http://pages.ebay.ca/help/buy/item-not-received.html
Unfortunatly you are responsible for the return cost.
Now as this item was less than $15.00 including shipping it may be easier just to buy one else where and keep this one for yourself.
If it hasn't been opened you could resell it on eBay.