Each in-game purchase is processed by the app store you downloaded the game from. To request a refund, you need to contact your store's support service.
To speed up the refund process, we recommend providing full purchase information: order number, time of purchase, or a receipt.
Cancel a purchase on the App Store - https://reportaproblem.apple.com/?s=6
Cancel a purchase on Google Play - https://support.google.com/googleplay/contact/play_request_refund_apps
Cancel a purchase on the Amazon Appstore - https://www.amazon.com/gp/help/customer/contact-us
To speed up the refund process, we recommend providing full purchase information: order number, time of purchase, or a receipt.
Cancel a purchase on the App Store - https://reportaproblem.apple.com/?s=6
Cancel a purchase on Google Play - https://support.google.com/googleplay/contact/play_request_refund_apps
Cancel a purchase on the Amazon Appstore - https://www.amazon.com/gp/help/customer/contact-us
Cancel a purchase on the Windows Store - https://support.microsoft.com/en-us/account-billing/returning-items-you-bought-from-microsoft-store-for-exchange-or-refund-81629012-aa4f-f48b-2394-8596f415072b