Why was the item delivered to the wrong address?
Was it an old address or did you use the wrong address at checkout?
You can open an 'item not received' case but, if the seller posted to the address you asked for, they will probably want to wait until they get the item back to refund you.
Items which are returned to the sender can take a couple of weeks to get back to the original sender.
"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)