Hello @sarah_harrup, Hearty Welcome to the Pet Rescue section of our friendly King Community
I am sorry to hear that you have lost all the saved up boosters from your game!! Unfortunately, that is what happens when we change our devices or reinstall the game App for certain reasons!!
If you are still using your old phone, the boosters will be still intact over there You can continue playing on that phone and use up all boosters to win some hard levels
Oh! If any of those boosters were purchased with real money, you will be able to receive them back.
Please let me know if you need further assistance, by tapping on "Type your Comment" box located below.