Telkom dont respect customer's time!!

so i had arranged for Telkom to come sort out my telephone and ADSL line. i called in and was told it would take 7 days for a technician to come out. as a working parent its obviously difficult to ensure that someone is at home as telkom have advised that access onto the property is required. at the end of the week, on sunday, i get a phone call from telkom to arrange for the technician to come out. the call is then to arrange A SUITABLE TIME for me!!!! so i get given 2 options, i then choose the most convenient option. the person on the other end of the line confirms that the technician will be there between 8 and 10am which is the time that was most convenient for me. by 10am after nobody shows up i then call telkom to check where the technician is, the lady then tells me that the technicians work between 8am and 4pm and that they will arrive during that time!! why on earth was i then called the sunday to arrange a convenient time with me!!!!! she then tells me that she doesnt know why that woman would have told me that, because they cannot confirm a time. i had to then have someone at the house to wait for them between 8 and 10 as that was the time i confirmed! eventually after 1 i get a call from the technician himself advising he is outside my house. i then tell him that there is nobody home at that point and that he was meant to be there between 8 and 10am. he then advises me that he was not given a time to be at my house. he only just got the message on the day that he needed to attend to something there. so my question is if telkom only advises the technicians on the actual day of when the work needs to be completed, then why when you call are they able to tell you within 7 days? sometimes 7 days is not even the case. i dont understand how they feel its just ok to waste people's time and they think nothing of it!