Primary user

So for some reason I can't seem to sign up for Xfinity rewards! It always tells me that I need permission from the primary account holder. And since I live alone and I'm the only person on the account and I'm listed as a primary account holder with management capability I should be able to do that on my own...... But guess what? It won't let me sign up or change anything. And the Xfinity assistant and customer service or not working.