Usually they should show up right away. I have the same Problem here. Check if the purchase is listet in "purchases" in the Frontier Store ( most likely it´s not )
I would recommend opening a ticket with frontier support on the issue. It might be an issue with purchasing more then one item at a time...
It did not allow me to access the points bit so I went through the Frontier Store as normal with PS4 account login. A day later, still nothing. I hope I will still get the stuff.