In general, purchased items are added to your game immediately. Occasionally, they may take a while to arrive. When this delay occurs, it means your purchase is still being processed. There is no need to try to buy the items again, as they should arrive soon! 

Typically, if the items haven’t arrived after a few hours, force closing the game and re-opening it may resolve the issue.
If force closing your game didn't work and you would like the items to be credited to your game, please provide us with a screenshot of your purchase receipt and order number. 

The order number can be found on the purchase receipt and looks like this: 

If you are unable to find your purchase receipt, you can go to your order/purchase history.
For your security, please mask your personally identifiable information such as your home address and credit card info.