We're aware of an issue with Facebook purchases for all King Games and our team is on it. 🛠️ Hang tight while we fix things! You can still enjoy the game, and we'll keep you posted once it's solved.
I too had the same thing happen to me. Was at about day 153, then on June 25th I was back at day 1. I play several times a day so what the heck is going on here? >:)