Telkom lines not resolved

We have been having the same problem since September 2014. We are battling to get calls in and out on all 3 of our current telephone lines. Every time a technician comes out to resolve the problem the lines will work well for about a few hours then goes back to the same issue. We keep being told that the issue is at the exchange but is Telkom really resolving the actual problem or just delaying by looking for the cheapest solutions?<br> <br> Our lines have gone from bad to worse that we currently have a dead line which is making it impossible to get any calls out. This is unacceptable and we are paying for a service that we are not even getting. This problem needs to be sorted out urgently!!!<br> <br> Ref no: 540CTZ200315