adsl not working and no response from telkom

Our adsl line isn't working telkom has been out and it still isn't working. We got a new router and mweb has checked the line. It is a fault with telkom. when the technician was here he said it was working fine. But we have no Internet connection. Also we signed up and are paying for a 4 mb line. And now we have been moved to a 2 mb line. Tried calling telkom several times and we get just get put on hold for 20 minutes. This is ridiculous And we're paying for a service were not getting. Need this sorted.