We would like to assist you in this matter, but due to policy, all currency transactions are handled by each mobile store. Please contact their Customer Center directly.
Android: https://support.google.com/googleplay/contact/play_request_refund_apps
iOS (iPhone/iPad): http://www.apple.com/support/mac/app-store/contact/
We apologize for the inconvenience, and hope you continue to enjoy our game.