This is why linking to god damn social media is the worst fucking idea ever. Who the shit even thought this crap up? Also, because they don't tell you being logged in to anything already on your tablet, phone, etc THROUGH ANY OTHER MEANS, means it links to that one. Accidentally linked it to someone elses? Your SOL.
Their customer service is the worst ever as well. When I asked if I could accidentally unlink the BS account attached to my actual FB account they go "no" multiple times and I just let that thread die. Worst idea ever coupled with worst customer service ever. Yeah, this is why I'm not interested into putting money into FFBE. Nothing beyond the 99 cents I put in for April Fools day.
While not the magical best thing ever, JP method is better. Just. Better.