Time Wasting/Constantly changing appoinments

I am having a problem, I had an appoinment with telkom to install my line on the 5th of November and was willing to wait. then last week friday 30/10/15 a woman from telkom called and said that they have a cancellation and somebody would be coming to my premises between 7:30 and 16:00 on the 31/10/15, i then waited at home all day waiting. I then recieved a call after 16:00 that day saying that he wont be able to make it and will attend the next day Sunday 01/11/15 before 12:00, I then got notification saying the technician is on his way, but nobody showed. Then on the 01/11/15 i got a call saying it cant be done because of bad weather on that day and the Telkom Technician Jonathan would call me when he is available. I then called him this morning 02/11/15 he then said he was at my home without notifying me and I never answered, I was home and my wife is home all day and he said that he left notification in my letterbox saying that he was onsite but my wife checked and nothing in the letterbox, so I need a number i can call. I thought the policy is to notify me before coming out, because nobody can just rock up at my house without notification that is a security risk.