Why can't I change my plan online? I AM NOT IN A CONTRACT

My contract expired and I have already paid for one month of service out of plan and the next bill is coming 12/16. I have been trying to review plans, but I get the below message every time. I saw where someone said you can't make changes if you are in a CONTRACT but as I said I am NOT in a CONTRACT; my CONTRACT ended and I saw an increase of approx. $50 per month, so I want out of my current plan/line-up. 

I do not want to spend time talking with an agent who doesn't speak good English and have them make changes to my account that were not agreed to like the last two times my contract ran out.  I want to take my time and study the plans on my own before making a choice.

Why am I not allowed to see the plans? If I cannot view plans on my own then decide, then I'll be forced to leave Triple Play and sign up for internet only. I feel like this is a very shady practice on the part of Xfinity and I have to believe there are consumer protections against not providing customers with published plan options. Under the circumstances, I'd be happy to file that formal complaint.