Problems joining Premium for Family

[zinesy]

Spoiler

Just joined premium for family and when I click on the invite it re-directs me to the login.  I login using my spotify login username and password and I get a message that I can't join premium for family because I am already a member of this (or another) Family plan.  Please click below to switch to the acount that you want to join to the Family Plan.  I do that and it takes me back to the login screen and so now I am in a loop.  If I try and signup and put my email address in it tells me that address is already being used.  I am being charged for Family Premium but can't join Family premium - Help?