Items in your inventory (lives, coins, collections and boosters) are stored locally on your device. You're not able to transfer your items across devices. This is done to prevent graphical errors and crashes/freezes.
To ensure you get your coins, lives, collection or boosters on a specific device, make sure you use that device when you collecting items in event or when making purchases in the game.
If you're having trouble with items with the game, or a purchase, please submit a support ticket in the game, by tapping the "gear" icon on the map screen, and then "support," or you can open an online support ticket here.