ADS-HELL line from Telkom

For over six months I have been paying for a service which I do not have. Between M-Web and Telkom blaming each other for the problem and escalating the query to supervisor level. All I get is excuses and No Results. My ADSL line simply does not work. They have come to the house acknowledged, we have a problem which they say could either be the line or the switch at the exchange...BUT STILL NOT RESOLVED! We will investigate and get back to you sir. Six months later, over 20 calls to both M-Web and Telkom, how patient must I be. Even the Telkom area manager has called me and said he would get back to me...still waiting. I don't know what more I must do to get this issue resolved.