Pathetic excuse of service and support

I have been sitting without a working internet connection on my DSL line for two months now. Telkom continually say that they will be sending out a technician to resolve the issue. Only once has a technician come to our premises to investigate the issue further. I then get notified that service on my line has been restored. However, performing a speed test on the line indicates seriously slow pings, and pathetic up and download speeds. Am I going to have to wait another 6 months before the actual issues on my line are resolved? Or must I rather look at a service provider who is actually prepared to help? And on top of that, we have been charged full price for a line that is performing at less than 10% of its capacity.