Check the email you got from Ebay when you paid. That will tell you the estimated delivery date.
One day after the latest estimated delivery date, you must open a case through Ebay to tell them you have not received your item.
"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)