THEMA: Change facebook account linked

Good evening. I would like you to help me by indicating where I change my facebook account since I have banned the one I had and I want to change it to my other account which is the staff.
I would appreciate it a lot since I've been a whole day opening tabs of the interface to see where I could do it but I can not find it.

You can not change your Facebook account.\r\n\r\nRegards,\r\nDejan