Why I can't login to an account that is linked to Facebook

@90xowxyehvmw Hi mate - if you wa t to have two accounts the safest way is to have them on seperate devices, otherwise the game doesn’t deal with it very well.

There are some trouble shooting tips here, but you are probable best to contact customer service either via the in game settings menu or via ea help website
EA HELP and FC Mobile topic list

https://go.ea.com/HowToEAHelp

https://help.ea.com/au/help-show-more-intents/?product=fc-mobile

Linking and restoring

https://help.ea.com/au/help/ea-sports-fc/save-your-game-progress-in-fc-mobile/?isIhi=true&p=fc-mobile