Very poor customer service and frankly disgraceful behaviour from the developers. I bought a pack and the game crashed immediately. On reopening the game no pack had been applied to my account. I raised a helpdesk ticket which was ignored. I then requested a refund from Google who thankfully paid out and rebought the pack which had glitched. I now have a message in game from the developers stating I have tried to exploit them. Get your house in order, this is all on your game crashing.