This game is a buggy mess. Sometimes you do a gem upgrade, gems are taken, but the upgrade doesn't happen. Other times, gems are not taken, but the upgrade happens anyway. I've even noticed at times that when I restart the game, gems disappear from my account while I was offline. Customer support is useless and does nothing to make it right. I realize this is just another Game Of War clone, but you would think the company could at least track purchases and do CS properly.