Comcast Failed Chat

About four weeks ago our service area lost both Internet and Cable TV service. It was intermittent and lasted for a few days. My husband called Comcast to see if it was a universal rather than an individual problem, and it was universal. Since that time we lost several 800 number HD channels. We still have cable and Internet service. We just don't have these channels. So at my husband's request, it was with dread that I embarked on a chat session with Comcast. I hate talking on the phone, so chat usually works fine for me. The long story short is that after an hour and a half of crawling around the back of the TV, unplugging and replugging the cable line, powering off the system and powering it up again, and having the data "refreshed," we have the same picture for those channels that we had when the conversation started. I knew as soon as she said that after 30 to 45 minutes things would be back in order it wasn't going to happen.  And it didn't. The only thing that happened four weeks ago was something external to us and it is really annoying that is hasn't been corrected. "One moment please" is lasting weeks.