MOST horrific service ever

On the 05-01-2018 a technician came out to repair my alarm as it was not sending alarm activation signals. I was billed R1000 plus for that. Yesterday I get home and my alarm was activated and I was not contacted by Adt. I called in and it was established that my alarm is still not sending alarm activation signals. I was transferred to a Nokthula who was so *********** and when I asked for a senior she puts me on hold for 10minutes and the call eventually cuts and she don't call me back. In my call with her she wanted me to pay again for a job that is no less than a month old. There is no way she can arrange a technician for the weekend as Adt technicians work Monday to Friday only and technicians on weekends charge R850 call out. After the call cut I call again and speak to Kelvin Ntuli. He assures me a technician will be out today between 4pm and 5pm. Lo and behold no technician arrives. I call today and speak to Nthabiseng who says the technician told the technical manager that he won't make it today. Neither him nor Kelvin had the decency to pick the phone up and let me know. I had to leave work early for Adt bearing on mind that also on the 5th January 2018 your technical coordinator Nick could also not tell me what time a technician will come out and I eventually had to take the entire day off to wait for Adt. Today Nthabiseng tells me that she can now all of a sudden arrange a technician for after 5pm or weekend when i was adamantly told this is not possible with our me being billed. I am utterly disgusted in the manner on which I was treated and want to know how do I go about terminating my relationship with your useless company??