repeated dropped cable tv service: frustrating periodic issue

Due to not being able to run cables to the TV wall my wifi is a gateway and it is connected wirelessly to a tv box connected to the Roku TV.  I get good wifi sent streaming (Apple/Neflix/Prime) with no problem directly to the TV.  Cable TV though has been cutting out on a daily basis and shows 3 dots with no picture or sound and then the TV gives an error code such as XRE-03137 or XRE-03090 or RDK-03117 and says check for loose connections.  All connections are tight,.  This has happened daily April 8, 9, 10 14, 17 (today).  The solution is I have to unplug the gateway power and then plug back in and then it works fine (until the next time).  I've tried restarting the TV or the cable box on the TV but neither works--only rebooting the gateway restores the TV cable signal.  The wifi internet connectivity is fine even when the TV connectivity is lost so seems to be a problem with the wifi connection to the tv box.  Chat assistant says it "resets" some setting in the gateway remotely but the problem keeps happening sporatically.  I suspect the gateway is defective and would like to replace it but CANNOT seem to get a live agent to explain the situation.  The chat assistant cannot understand that rebooting takes care of the problem but that the problem is recurring.  You should add an option to the chat assistant that allows us to indicate it is a recurring problem (not a continuous problem).  I have also had zoom and teams meeting freezing issues even though my computer download speed is 116 and upload speed is 35 and latency is 30ms but that likely is a separate issue.  Please help me connect to a live agent or allow us to enter somewhere on our account page info to have someone call to discuss or set up a ticket!