Redirect loop

[Starphoenix]

I made a post about a month ago how I cannot log in on my mobile app with my iPhone 6s Plus when I try to log in with Facebook as it says "Invalid username or password, have I signed up for Spotify?". When I try to access my account on the website itself, it gives me too many redirect attempts when I try to login with Facebook. I changed my Facebook password and still nothing. Uninstalled the app and Facebook from my phone, still nothing. 

I've researched this but there seems to be no definite answer on the web.

What do?