You have recourse through ebay, and can initiate a claim process after about 10 days or so. They'[ll give the seller a chance to prove delivery or otherwise respond to your claim. The rules are that the seller is responsible through delivery, shipment alone (even when proven) isn't enough.
BTW- all this is clearly laid out by ebay (read buyer protection), and just out of curiosity, did you check the seller's feedback before buying. If they have good feedback -- 99% or better -- odds are it's simply an isolated communications problem.
__________________
FB
Chain-L site
An ounce of diagnosis is worth a pound of cure.
Just because I'm tired of arguing, doesn't mean you're right.
“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN
WARNING, I'm from New York. Thin skinned people should maintain safe distance.