Edit
I misread your original post.
If the seller won't send you a promised receipt, there is nothing you can do through Ebay.
Why do you need to transfer ownership into your name?
I am not quite sure what that means.
"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)