Hi @Prisca_Simango
We warmly welcome you to the Friendly King Community's Candy Crush Saga forum.🤗
Please follow the steps given below.
Open game > My account > Log out from Facebook > Close the game app.
Open Facebook app > Log out Facebook > User Accounts > Remove other account > Close Facebook app.
<<<<<<Restart device.>>>>>>
Open Facebook app > Log in with your ID.
Open Candy Crush Saga > Connect with facebook > Check Game & Let me know.
Welcome to the Candy Crush Saga Community
Do you have a question or need help with your game? Ask the Community.