Have you had an email from Ebay confirming that the refund has been processed?
If you have, the time taken to get a refund can vary depending on how you paid.
In my experience, Paypal comes back really quickly.
Payments to your bank can take several working days.
If you paid with a credit card, that can take several weeks.
"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)