20-40% packet loss over the past two months

We have a business account and we started experiencing packet loss around two months ago. Despite calling the customer support numerous times, it seems Comcast just doesn't care.

Here are the things that have been done so far:

- 5 times technicians (either contractors or in-house technicians) visited our office to check the modem, line and any other equipments.
- 3 times modem was replaced (no effect)
- 2 times we were told the street construction might have affected the line and it'll be fixed soon. (It wasn't)
- 3 times we were told the modem is good and the line is fine so comcast should send a "network engineer" to check but then again
the next guy shows and they repeat the same thing over and over again.
- 9 times we called customer service. 3 times the line was dropped so we had to repeat our story again. Once we get to an agent
they keep repeating the same instructions (resting the modem, turing of wifi, etc.) over and over again.

Here is a screenshot of the packet loss over the past 7 days:

This is extremely frustrating as we have a business which relies on the internet heavily.