Ongoing Faulty ADSL line;DONT USE TELKOM

My TELKOM 4mbps ADSL line has been faulty since mid-November. The line has kept on dropping and losing the internet connection and then reconnects at a very slow speed, much less than 1mbps, usually it is steady at 2.5 mbps. IT IS NOW COMPLETELY DEAD. I have now reported this fault SEVEN times, here are the fault reference numbers; 786CTK191115, 793CTK011215, 1107CTK071215, 36CTK151215(escalation 796927), 405CTK161215, 121CTK010116, 684CTK100216. Each time I report the problem the technician tries to fix the fault at the exchange, then closes out the fault without it being fixed. The problem is the line, but I can get no one in Telkom to attend to the problem and actually fix it. Today I will finally cancel my service with Telkom and find another solution. I run a business from home and can no longer endure this situation.