4th complaint - still no feedback just promises..

Requested a line installation, received a sms to advise me that they will come 10 Feb 2016 between 7:30 and 16:00. On the 10th at 11:33 we received an sms to inform us that the technician has been dispatched. He never arrived. Thus a days leave wasted.. At 16:20 I called, and the call centre informed me that the matter will be sent escalated, and someone will call me that same day. No one called, I received an sms the next day to inform me that the installation for the new line is now scheduled for 4 March? Logged the above complaint, they said they would investigate, but no one came back to me, however the technician came out today - 26 Feb (received an sms on Wednesday to inform me), he arrived at home, didn't even go out to the back, but now he is unable to install the line, because the cable joiners has to join cables first and they cant tell me how long it will take!! Is this just pure laziness or uselessness...... I have still not had a call, or feedback and still no line!!! *** 3rd complaint 9/03/16, 4th complaint 15/03/16...