More detail would help: what you bought and when you bought it; private seller or business; reason you want a refund and what has happened so far?
Did you receive the item? Did you open a case through Ebay?
"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)