Start by checking your internet connection, as it has to be stable for newly purchased items to be added to the game. If it was lost during or right after the purchase, try restarting your device and check to see if the purchase shows up.
If the purchase still doesn't appear in the game, please go ahead and contact us.
Make sure you provide the following information to support your complaint:
1. The exact amount of the items you purchased;
2. The time of your purchase;
3. A copy of the receipt or a screenshot of your purchase history. The receipt is emailed to the account used to make the purchase soon after the purchase is completed. You can find more information about your purchase history in the customer support section on the Apple and Google websites.