Yeah look you've probably been scammed. Same thing happened to me except the guy sent something in the post so I got excited, but instead of the iPhone I bought he sent me a $10 pair of reading glasses from the post office.

First of all I would ask how long you have had to wait. To me anything over forty eight hours in probably unacceptable. After that amount of time I would begin to get suspicious. Unfortunately I don't think there is a lot that can be done by way if recourse, I wouldn't waste your time with carousell as by reading my reviews you will know my thoughts about their app and how it blatantly supports the selling of fake items, so the fact they allow that standard of seller to operate extremely easily will tell you how much they care about buyer security, the two go hand in hand when you're dealing with that type of low level of seller.