Hi sakib - Contact the seller and tell them. Give them a little time to respond, many sellers don't do ebay full time. It's the seller's responsibility to make it right. If they won't, you would have to file a dispute. You have 45 days to do that, watch your timeline carefully. Hopefully you won't have to do that. Come back here if you need to.
When you're a Southerner you don't ask if there are crazy people in your family, you just ask which side they're on.