Lines cut off due to Tellkom accounts problems

we cancelled certain lines over a year ago and we are still getting billed. Eventually we were credited and lines reconnected. Immediately we started getting billed again for the cancelled lines. Out lines have now been disconnected for a third time. It is impossible to get anyone to help us by phone as we have spent over 3 hrs holding over the past wk. Henk smit was the person sitting this out but we are unable to contact him