Issues with Paramount plus with Flex box

Voice description stuck on, volume goes up, pause doesn't work. At times I turn TV on and get dark screen if I speak Paramount plus or any other app on TV it will go to it but am unable to choose from screen because it's dark. Can't skip recap of previous shows it shows >> to push to skip and it doesn't work. When pausing the arrow in a circle continues to circle over the show until finally an error pops up saying unable to process try gain later I push ok and get sent back to menu with all apps on it. I have spent numerous hours on phone with tech, tech came out today even, yesterday went to Xfinity and even picked up new flex box. I feel like I am employed by them at this point. I've done more to fix the problem then they. Still doing same thing. Extremely frustrated