Impossible to pay your bill anymore, problem has been going on for months now

So within the past 2 months i have not been able to pay my bill online anymore, before i was getting a error everytime i try to access the page, sending a one time pass code and that never worked. So a 3rd month now, right now trying to pay my bill online, i get this message:

"Your session is about to end

For added security, you'll be automatically logged out and redirected to the login screen in 60 seconds." 

Downloaded the app, cant access anything. Seriously all of xfinity users should compensated with a huge credit towards their bill for this nonsense. 

The only way to pay bills now is through the phone walk-through.

I'm about to call HQ and write a letter addressing these issues to the higher ups. Makes no sense to what is going on with the website and app, its pretty much useless now.