Missed app and Telkom always busy

We requested a Telkom line to be done at our new place. Appointment was made for 19/10/2015 (This after struggling with an *********** call centre agent). We were told it would be a whole day appointment. We therefore organised our day accordingly. A little before 16h00, we still had not received a phone call or technician. After trying to get through to the Call Centre many times, I got through on the Chat Service. I was told the Technicians phone rings and goes to voicemail and that they would escalate the case with high priority. I have been trying to get through to Telkom since 08h00 this morning (20/10/2015) but they ALWAYS have High Call Volumes. I want to know what is going on and who is going to sort this problem out IMMEDIATELY!? It is highly unprofessional that a technician misses an appointment with NO call. I actually have no words at how ****ed off and upset I am at the entire situation. Telkom, please sort this out ASAP. Your landline department is terrible! Whereas I have never had issues with the Mobile side.