Telkom gives poor service

For over a year I have been having problems with my ADSL speed. Telkom blame it on MWeb or the distance between the exchange and my house, but nothing gets done about it. The neighbours across the road have a fibre optic cable link to the box on the corner of Sheridan and Cambridge Streets and get get speeds up to 20Mbs if they want to. I pay for a 2Mbs line of which on occasion for like half an hour if I'm lucky, I can get speeds of 1Mbs, but for more than 95% of the time I'm lucky if I get 0.11Mbs download speeds. Telkom blame MWeb, Mweb blame Telkom, but I am now convinced it is a Telkom problem and they are just not prepared to invest and sort this problem out. So I'm giving them until the end of this month to sort out this issue or I'm going to cancel my phone and ADSL line with them and operate on 3G. I am tired of paying for a service I don't have. Unacceptable service.