Today Xfinity STream Keeps Logging Me in Then Out OVER AND OVER AGAIN.

Can someone fix this. I have constant issue just logging in to pay a bill. Today, the one issue that I didn't have (loggoing in to Xfinity Stream) is pissing me off royally. Why would it keep asking me to log in especially after I logged in successfully, and 2 seconds later it is asking me to frigging log in again. So sick of paying exorbitant fees and getting terrible service. Is anyone out there going to help me fix this????????????