I’ve logged into love nikki via apple ID. I’ve binded my email also. I’m wondering how I can..

I’ve logged into love nikki via apple ID. I’ve binded my email also. I’m wondering how I can bind my facebook too. Apparently you cannot have all three. But I am stuck with my apple ID now and not sure how I can do this without losing everything. I do not have “bind account” on the right side of my screen. I also have tried logging in “mail” on the main screen before actually logging in. Someone please tell me if this is possible!?