If you didn't receive your in-app purchase, please close the game, open it again, and restore the purchases using the Restore Purchase button in the game. You can find it in the setting sections. 
If that does not work, or you can't find the Restore Purchase button in your game... No worries! If you are reading this on the in-game support chat, just tap on "No" at the bottom of this question, and you will be able to contact us. If you are reading it on the computer, tap on the Contact Us button and fill the form. A support agent will assist you in finding ways to solve your issue.
If you have an iOS device, please, send us the specific receipt of your purchase. You can find it in the confirmation email iTunes sends or in your iTunes History Purchase (https://support.apple.com/en-us/HT204088)

If you purchased the pack on an Android device, send us a screenshot of the specific receipt. Please be sure the transaction ID appears there. It looks like this GPA.1234-1234-1234-12345 You can find all your purchases made on Google Play in your Google Payments account: https://payments.google.com