Purchases are usually delivered instantly, but may in some cases take longer.
When such delays occur, it means the purchase is still being processed. There is no need to try purchasing the same pack again – it should arrive soon.
In the meantime please try the following troubleshooting steps:
1) Reboot your mobile device
2) Make sure the Internet connection is working correctly. If possible try another Internet connection – for instance from WiFi to mobile data
3) Make sure you are logged into your app store (e.g. Google Play, iOS AppStore) with the same account with which you made your purchase
Apple users who have not received a purchase made more than 24 hours ago, please contact Apple support. All payments made toward the game are processed by Apple. You can reach them right here: https://support.apple.com/contact
Android users who have not received a purchase made more than 24 hours ago, please contact Google Play directly here: https://support.google.com/googleplay/answer/2479637?hl=en and scroll down to Option 2 ‘Request a refund on the Google Play website’.
Accidental purchases can be avoided by setting your device with restrictions.
For Apple: https://support.apple.com/en-us/HT204396
If you’d like to continue making in-app purchases, set the device to require your password every time you make a purchase (select “Immediately”) or every fifteen minutes.