Keep saying I'm disconnected from the internet but I have internet and I can't purchase

Hi @Jalal1081 did you change the password on King.com or on Facebook? It sounds like whichever you have changed, you need to re-enter the password within the game. 
Can you hit the cog, and click connect, or if it says connected, click disconnect first, then connect again.

Ok did you try disconnecting your king log in? Do you have access to a computer? Can you go to the king.com website and log in there and see if your password is working ok and your progress appears and let me know if that works or not please. 
Also, go into settings on your phone, go to apps, then FHS then clear cache, then go back to settings, storage and clear cache and try logging in again into the game and see if that works  

I ah I’m sorry. I’m going to tag one of the team, @Crazy Cat Lad to see if he can help. It might not be until Monday though as it’s the weekend now