10,000 crystals wasted and still no bts :(

From all of the crystals I wasted I didn't get ANY bts cards from my pulls. The 2 Ur ones (JM, Suga) I got from grinding the roulette and the jhope and RM one I got from spending irl money. I REALLY want to delete this game but I also don't want to because of the money I spent TT They won't refund my money either:(