Telkom can not keep promises

We have moved to a new house and app**** from Telkom to transfer our ADSL and telephone line to the new address. Today was the third appointment Telkom scheduled with us to come and install the line, and every time a different technician arrives and gives us an different excuse why he cannot install the line and that they will reschedule. Everytime we need to take off work just to be told they will reschedule without an excuse. When you call the call centre to find out what the problem is and to complain they just simply cut you off. This is the most pathetic service I have received from any company in a very very long time.