All in-game purchases are processed by the store the game was downloaded from. After making a purchase, a receipt is sent to your user's email. You can find it in your inbox.
If you can't find your purchase confirmation email, you can find the receipt in your personal account:
To review your purchase history, please check the instructions below:
For iOS devices:
- Open the App Store on your device.
- Select your username (this should be your email address), and then select Account.
- Scroll down to Purchase History, and select See All.
For Android devices:
- Enter payments.google.com, then sign in with your Google account.
- Select Transactions to display your Google Play order history.
- Choose an individual entry to view the corresponding receipt.