As a policy, we do not refund valid purchases (see Refund Policy). The in-app purchases you make in the game are final and non-refundable. The design makes sure that the purchases made, should not be accidental, due to confirmation messages.
As Empires & Puzzles is an online multiplayer game, reversing progress or refunding valid purchases would provide you something for free, which wouldn't be fair to other players. Same rules apply to every player.