Xfinity app

This Xfinity app is the worst!! Was duped into streaming with use of the app to save a couple dollars.   This was the worst decision, constant buffering with the highest speed internet available.  The other apps work perfectly on me 4k firestick.  Would like to have my contract cancelled and switch to Verizon asap.   I am so frustrated and just get lip service from the Comcast folks !!!    Don’t do it!