Call closed AGAIN without action 3rd time 1 month

I have lost all faith that Telkom will ever be able to supply a decent DSL service. When I started using my 4Mbps ADSL line I could only get about 3.2Mbps due to the distance from the exchange and I accepted that but the quality of the line degraded with time to the point that I could only get around 2Mbps and had to reset my router daily. I logged a fault with them and they sent a technician within a week but this technician only ended up breaking the line to the extent that I can now only get around 500kbps and then closed the fault. I had the fault reopened just to have Telkom do nothing and close it again. I once again had the fault reopened, had a technician testing my line but he had no clue what 'ADSL sync rate' meant and could only tell me that the line must be working because he could measure 5.2 volts?!!?!?! He promised to have an ADSL tech assigned to the call but instead, I just received an SMS saying my service is restored. But it isn't! I just checked and can only sync at 500Kbps again! Telkom just could not care less about DSL clients as they have the monopoly!