3 months and 9 calls logged and still no resolutio

3 months and 9 calls logged, adsl downgraded to 4 mbps, now only connects at 2937mbps, pings at between 2000 ms and 3987 ms with a packet loss of 70%, 8 previous calls all closed nobody at Telkom seems to know how to fix the problem and just close calls, last call now escalated 819CRK211215. No other way of speaking to a manager or supervisor at Telkom, I have spent in excess of 30hours on the line to the help desk, can nothing be done to resolve this?