Then you can just log in on your game on the computer using the same login information as you used on previous game, your progress will automatically retrive, but you might loosing your boosters ( if there’s any ).
Here’s what you can do to retrive your pasword for your old Facebook account, log off from your new one, then try to log on with your old one by clicking ‘forget your password ‘. they will ask you for your email account that associated with that account. After you do that, check on your email, you should get a notification to set up the password. and you should be good to go from there.
My friend @mysticalmysty has provided all the help that can be for the issue you are having!!
There is only one more thing I can suggest you to do... to contact the "King Support Team" through this link https://soporto.king.com/contact
While filling up the able form, please choose the "Topic" with -- "Problems with my Game", then fill the "Sub-Topic" with -- Login Issues". And explain bit more at the box "Tell us what you need" about the issue.