LANDLINE INSTALLATION

I have ordered a landline installation for my house on 18 July 2015. After a few follow up calls they scheduled an appointment to come and have the job done. This appointment was cancelled and re-scheduled a couple of times (from their side I might add) but they finally confirmed an appointment for yesterday (04/11/2015). I took leave to be at home and had all the required documentation ready but they never showed up!! At 17h58 last night I received an SMS to say that the technician had been dispatched. Even though I found this unusual I was still hopeful but no one showed up. I called their helpline to inquire after this failure of delivery only to be told that I cancelled the appointment because I said I was not ready and moved it to the 6th! Why would I do this after waiting for 6 months? And why the SMS to tell be the technician is on the way? Nonsense and lies! I still have all the correspondence indication may confirmation of yesterday's appointment and I have not correspondence confirming their claim. This is utterly pathetic and completely unprofessional.