Stole my money – Card Wars - Adventure Time Card Game Review

I went to buy the 10$ gem pack and when I purchased it I didn’t get any gems...don’t know how to get my money back. It would be awesome if I could get my money back or get the the gems but as of I got screwed over 10$. And if any one knows how to fix this please let me know
Review by Rylee21753 on Card Wars - Adventure Time Card Game.