Faulty DSL ongoing despite numerous complaints

Could someone at Telkom please tell me why they just cannot fix my DSL line. Since December 2014, the line has been an absolute pain in the **** with the line sync speed dropping from the subscribed 4Mb/s which I PAY for to well under 2Mb/s.<br> <br> Every time I report it, nobody bothers to phone me despite my wife asking the techie to call me. He mucks around and then tries to tell my wife that my phone is faulty and is causing the problem. Even if the phone is UNPLUGGED, the fault continues but they send an sms stating that the techie has resolved the issue.<br> <br> Is there anyone at Telkom who actually cares about their customers and is able to resolve my problem?