First, perform a quick diagnosis. Without some basic information, service providers cannot determine the possible source of the problem and resulting solution:
Then if you have confirmed that the problem lies outside your system, contact the local service provider (Comcast, Time Warner, Dish, etc.) with ALL THE ABOVE INFORMATION. Then contact your local network that provides the show (ABC, CBS, NBC, Fox, A&E, etc.) Also please copy us via the "Contact Us" page to make sure we are aware of the issue.
If the problem persists, you can file a complaint with the FCC.