Purchased STX. Can't see them

Not a total crypto neophyte but new to STX. Thought I’d learn as I went. Downloaded the app. Purchased minimum STX (500) from CoinSpot last week. All blockchain records are there. But STX has not arrived. Where will it be? I copied and used the Receive address. (PS: there are not enough/no instructions on how to use the app. You won’t appreciate this because you’re all young and internet-savvy in all respects. I’m not.)