I added a new device but my boosters didn’t transfer. How do I get my boosters and special candies a

Hello @humyra There is no way that King can transfer your boosters because King have no record of what boosters you had. Boosters are stored only on the phone you used when you earned them and do not transfer between devices. If you still have that phone then please play the harder levels on the old phone to use up all those precious boosters, and claim any new boosters you earn in events on to your new phone to build up your stock again.