says user ID and/or password incorrect OVER AND OVER AND OVER AGAIN

says user ID and/or password incorrect OVER AND OVER AND OVER AGAIN and it does this intermittently for days. So frustrated. Both are correct every time it won't let me in. I pay sooooo much money to Comcast that I expect to be able to access my email at any time when using MY CORRECT LOGIN AND PASSWORD. Fix this glitch, Comcast! Or give me a way to talk to a REAL person, your AI system is a joke.