CellPhoneCases / they said order was delivered but it wasn't

Bought an iPhone case from this store CellPhoneCases and didn't receive it.
When I contacted customer service about my order they said that it was delivered but it wasn't!
I told them that there was some kind of mistake because I haven't received anything, but they didn't want to listen. They kept telling me that order was delivered to me and then they even said that I personally received it. What? Where did they even get that kind of information?
Anyways, all I can say is don't buy from them. CellPhoneCases is a scam website operated by a bunch of cheaters.