6 weeks and still waiting...

Totally fed up. We have an intermittent ADSL line. It works for 10 mins then stops working for 10 mins and this has been going on since 1st February. We cannot get this fixed no matter what. 2 Technicians have been out but still no joy. For the past 3 days Telkom have phoned us to say they are sending a Technician out that day so of course we wait in and nobody arrives. Then today Mark the Technician phoned to say he was coming at 1130 but surprise, surprise no Mark. However we then get a message from Telkom saying our fault has been restored!!! How about somebody asking us if it has been restored. Fed up having to make daily calls to Telkom. Where do we go from here? Paying for a service we are not getting!!! Also sometimes the phone goes dead when ADSL is off and on occasions the phone will ring day or night - just one long ring with nobody on the end of it!!!!