Live view not working on cameras

So we just switched from AT&T last week to Xfinity and since then our doorbell camera and garage camera will not show a live feed. They get notifications for movement but will time out if we try and get the live view. I talked with customer service yesterday and we reset all the devices together on the phone but then again a couple hours after, the live view stopped working. I ran the internet test and that is working great. All the cameras are getting good signal per the app and the customer service ladies. I’ve logged out of my app and tried updates. Anyone have any tips or tricks? Because if we can’t get it figured out we will have to cancel our service Thank you!