Maybe have a go at the troubleshooting suggested here, Rhona: https://care.king.com/en/candy-crush-saga/cant-get-your-games-to-load-on-facebook-check-this-out
Don't think you'll get much help here as it's not for royalgames, you'll probably need to use this contact form: http://www.royalgames.com/support/stt/?action=contact&categoryId=6
As long as you actively connected your game to either Facebook or Kingdom beforehand, your progress will be saved and synced to it. If you did, when you reconnect to that account in the game again, the progress from the point where it was last synced will come up.
Try going through the troubleshooting steps suggested here: https://care.king.com/en/candy-crush-saga/cant-get-your-games-to-load-on-facebook-check-this-out
As long as you actively connected your game to either Facebook or Kingdom, your progress will be saved and synced to it. If you did, when you reconnect to that account in the game again, the progress from the point where it was last synced will come up.
If you get stuck on a level for a while, what I'd suggest and do myself is to watch videos of the level being completed by others as it can help point you in the right direction: https://www.youtube.com/watch?v=7ncPDoD_-Do