TELKOM CAN'T FIX ADSL LINE

I'm currently with axxess as my ISP (great ISP by the way). From about 2 months ago I've been experiencing real bad latency, download, and upload speeds on my 4mbps adsl connection. The first technician from Telkom resloved the latency problem but still getting down speeds of 1mbps-2.5mbps. So another technician had to come out, he did some tests and said something is wrong with the line since I'm also getting bad signal to noise ratio and bad interference on the line for some reason, he just needs to go check at the exchange and we will be back in 30 minutes. He was there the morning and never came back... !!!<br> I have 3 friends the same thing happened to, technician telling them he needs to go check the exchange and then just disappears.<br> THIS IS EXTREMELY POOR SERVICE.