I have lost all my booster.

Hi @amitt8494 . Welcome to our Community

Boosters are saved directly in your device's memory, which always allows you to use them while playing offline. This also means that if you delete and reinstall the game, then Boosters can be lost and just saved Levels.

It’s best not to store too many Boosters on your device, as there is a chance they may be lost, or affect the game play. and save your game in Facebook and King Account.

Please read links bellow about lose booster!