Epic Cards Battle

How come i cant loglin the game trough my facebook ID its said facebook errror

How come i cant log in trough my face book ID for whole day?

Anybody can tell me why I can't log in the game by my face book account?and how to remove the ex ID out of my device I want to put new ID on instead from yesterday day till now.it said face book error

I been try to log in all day and night it's said face book error,and how I remove my ex I'D or delete x I'd out of my device?