Telkom has let me down :-(

I've had 4 logged faults in the past month now and still Telkom hasn't succeeded. I experience intermittent ADSL and voice Service. My ADSL drops connection constantly and re synchronizes constantly. The Panorama Exchange has been faulty for a really long time now. I have a 4 Meg line and I get speeds of 1.5 to 2 megs. Four different Technicians has already been to my premises and none of them can explain to me the problem. What are Technicians for then? It's been months now that I'm complained to Telkom and I still await Service Delivery.I'm a really unhappy and frustrated :-( Please have my line repaired Telkom???? I'm exhausted of fighting a losing battle. My Telkom ref is 587CRK010316.