If you don't see the pack you purchased in your Collection, please restore it in the following way:
open the Puzzle shop -> click on the button in the bottom left corner - My Purchases -> tap on Restore all paid downloads (to restore purchases made with money!)-> find the pack and tap Restore on it.
If you purchased the pack with money (not coins) but don’t see it in your Collection, please repurchase the pack using the same Apple ID you used for the original purchase.
Repurchase is always FREE.