Please allow a bit of extra time before contacting support about missing diamonds or items you have just purchased from the Store.
Purchases usually deliver instantly or within minutes, but may take longer. There are many situations where we may not have been able to complete the transaction entirely.
When such delays occur, it means the purchase is still being processed and it should arrive soon. If delayed, your purchases will usually be delivered the next time you reload the game while connected to the internet.
If you haven't received what you bought after a while, please contact support with a screenshot of your order receipt.