Were you logged into your Ebay account or did you check out as a guest?
If you did, you will get a confirmation to the email address you provided when you bought the item, rather than your Ebay inbox.
"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)