Digital tiling-all channels-Virginia Beach, VA

I continue to have repeated digital tiling/screen artifacts that began on Thursday, March 4th, 2021.  I am Cox Complete Care customer in the Ocean Lakes section of Virginia Beach, VA.  I have only one television, a 2020 Samsung 65 inch Q70T, and Gigablast internet.  The internet is fantastic.  No problem there.  At varying intervals, on my TV, I will have digital tiling on my TV, on all channels, from 2 to above.  The tiling does not occur on any On Demand, or Streaming APP.  I had the connectors and all wiring upgraded in September of last year when we went to Gigablast.  I have everything on new surge suppressors and on APC UPS.  I changed out the Contour 2 box on Monday of this week and it did not stop the tiling issue.  I had a Universal Service Technician make an inspection yesterday, Work Order 058611119, and it is marked Completed today.  The Cox tech put in a couple of new connectors, and checked all of my signals, and said my signals were good and that there were no "bitrate errors from the Plant" or at my system, and before he left he watched some TV and confirmed the digital tiling, which appears to occur at specific intervals, such as 7:08:38, 7:10:38, 7:11:38, etc. at all times of the day, on all channels.  The Cox technician stated he would contact "Maintenance" to see if there was anything going on that would cause my issue, and that he would call me back that afternoon, which he did not.  I would like to escalate this issue, please.  What do I do now?