While there are some ways to cheat the system in Candy Crush, it's imperative to note that services and programs that promise to hack your Candy Crush game or give you free lives, boosters, gold, or anything else, are almost always scams to be avoided.
Uninstall and reinstall Candy Crush Saga. Then, open the app, tap "Retrieve My Progress," and connect to Facebook. If Facebook's access to the Candy Crush app has expired, you can renew it in the Facebook app. Clear your game cache on Android and delete or offload the app on iPhone and iOS to refresh the connection.