Update Messed Up The App

The March 20th update of this app left me without several channels. All I get on this app for several cable and premium channels is blank boxes. The same for my iPhone and my PC. Ninety-plus percent of the time Im using our Comcast home Wi-Fi. Yesterday I called customer service and they indicated that nobody else has any problems. They must not read these reviews as several folks have noted various problems with the app. My wife, who has the identical iPad has no problems because she did not update the application. I sure wish I hadnt. HELP!

Larry ##68 about Xfinity Stream, v4.0.2