I finished level 80 and waited 72 hours. Now it says 0 wait time but I can't get in.

ElizabethLincoln

She let me in after waiting but when I tried to play the next day I couldn't get back in even though it says 0 hours wait time.

StuckInATree

I've had this a couple of times before, when I replayed the level before the roadblock it seemed to do the trick so give that a try!

KingsPinn

Try these steps, see if they help, go back to the game and see if you can progress: 

https://care.king.com/en/candy-crush-saga/cant-get-your-games-to-load-on-facebook-check-this-out