ADT Joburg technical line poor service

I phoned the technical line of ADT Security in Johannesburg around 7 or 8 May to report that during load shedding I had not received an SMS notification of failure of AC power at my house. I had called them some weeks before about the same problem and a technician was sent to attend to the problem, and I was billed about R800 for his time. I thought the problem was resolved.<br> When I phoned this time I was told that their system had not received a notification of AC power failure, and they asked me to test the system. I told the people on the technical help line that load shedding had done it for me and wanted to them to look into the problem. When I got no satisfaction I asked to speak to a manager, and was told they were busy. I asked for the manager to phone me, but until now I have not had any response.