If the seller cancelled the sale, that would have triggered a refund.

It is possible that the seller did not cancel the sale.

Have you got the email you got from Ebay when the seller cancelled the sale?

"There are two ways to be fooled. One is to believe what isn't true; the other is to refuse to believe what is true.”
Søren Kierkegaard, Danish philosopher (1813 - 1855)