What error messages or notices have you received from eBay? Has the seller messaged you and if so what did he say?
We need the facts to be able to help you understand what is going on. When you don't understand what is happening (especially what a message from eBay means) you will not do a good job at summarizing it for us, we need the exact text.
How soon after the transaction was your order cancelled? Had you paid? Did you get refunded?
