What sort of case have you opened?
If you collected the item, you can't really open an 'item not received' case.
If you open a return, the seller won't be liable to refund the 'fine' you had to pay to collect 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)