Repeated Connection Drops

Ok, so I had a COX technician come out, and he ran a test on the cable - said it was operating per normal function.  I told him you had noted the transmit power was high - and he said it was, but when COX set up the line they added an accentuator (not sure if I recall that being the exact name) that leveled things out.  We did a speed test and he said that was fine, but most likely what is happening, is neighbors have gigablast and are sopping up the bandwidth, and that COX would need to expand the data at the "tap"   He tried to explain nodes and what is above and below (sort of giving me a huge explanation of the different levels - but noted that he can only see downstream at a certain point.  His advise, was to ask COX to expand the tap/ or whatever its called that comes into my condo complex.  He said that I should ask around and see if others have internet issues (which seems really lazy - but he is a third party technician in these parts and not a total COX employee).  Not sure what asking around would do, other than give more background to COX that more bandwidth is needed - however, he said likely a neighbor has Gigablast and everyone is WFH and doing meetings at same time, aand the Gigablast customer is taking the bandwidth.....  SOOOO, since calling or chatting with customer service only gives me the standard "turn your modem off and on, replace your modem, replace your router...."  How do I "talk with COX about the amount of bandwidth that is coming into the condo complex that I live at?