Poor network latency on Vodacom Fibre and no assistance

I have a Vodacom home fiber connectivity issue. This is specific to google meet video traffic. I have troubleshooted this extensively with google meet online and it turns out that the issue is specific when I'm connected to my Vodacom Fiber network or router. When I connect via other networks and router the video stream works.

The issue I'm seeing on google meet is that I can only see the video of one participant at a time so on a call of say 5 people I would only see the video of the person talking with all the other video streams not displaying.When I hover over the other participants it tells me I have a network issue.

Checking the latency of my network it says it's unstable - https://test.webrtc.org/?test_filter=Network%20latency

The issue was raised on 5th May and I have had no action or response. I have called to followup 3 times each time no feedback is provided.

Issuer reference number - SR***