If the seller had actually cancelled the sale, a refund would have been automatically generated, and you would have an email from Ebay saying your refund was being processed.
If the seller hasn't done this, then you will have to wait until one day after the latest estimated delivery date and open an 'item not received' case.
"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)