How do I keep Xfinity updates that are going out every couple of hours from bricking my modem?

Xfinity is pushing out faster speeds in my area and it keeps bricking my modem. I have to factory reset it and redo all the passwords and WiFi names before I can get service back. The Xfinity tech said he had to provision it and after that, I should have no trouble. Well, it's been bricked 4 times since then in a day's time. It's really, really annoying. I wish Xfinity wasn't so incompetent with their updates. How can I keep them from bricking my modem every few hours? I'm working hard to not use a string of obsenities here. It's maddening that Xfinity doesn't care how much havok they cause.