content: Cancel your service. Nope really, that's pretty much it. Comcast has contracts with a lot of people to make sure that they are the only option you have most of the time. That said, money will always speak louder than words or angry emails, you bet your ass if enough people in your city just said fuck it and made the decision to tell comcast to go fuck itself, you would start seeing changes really fast. Unfortunately that's never going to happen because people are hard to motivate until it's too late.