Packet Loss - No Resolution

For the past 1.5 months my household has been dealing with a lot of packet-loss. We get roughly a consistent 2-3%. This can become extremely troublesome if in video calls, voice calls, gaming or anything that requires a real-time connection. You'll notice a lot of voice dropping and connection issues. 

I've had 4 technicians come in to try and solve this problem.
* The first technician referred me to a trouble call after noticing that the packet loss issue was present in the box entering my building so had nothing to do with my connection itself. 
* The next technician came and replaced the cables in the box but the issue persisted.
* The 3rd technician came and was noticing the same problem and said that it had to be escalated to the xfinity network / construction team since the cable coming into my building may be faulty and they'd have to map the source. I got a text saying that my network needed maintenance and it would be resolved in 24/48hours. Within 3 hours they said it was resolved, however, it was not resolved the issue was still there. The request was punted back and nothing was done.
* Finally I had to call a 4th technician who said the same thing and told me that the network / construction team would need to come resolve the issue. He submitted another request. The same thing happened and it was punted back and nothing was resolved.

The 2 technicians left me their phone number to follow up if things are still bad, but neither of them picked up / responded to any texts about this. I'm looking for next steps on how to resolve this issue since I haven't had any luck yet.