Bad After Sales Service

Our security system was installed by a contractor to ADT Security in July 2013 and has not worked correctly since that date. We have contacted ADT on numerous occasions and their technical department have been on site uncountable times. It has now got to the point that half of the security system has been deactivated by them due to them not knowing how to repair it. Since deactivation, they do not come back nor contact us as according to them the problem has been resolved. We lodged a call out again last week and they quoted us R1767-64 to replace the keypad claiming that that is purely the cost of the keypad with no labour attached. However at IDS, as a cash customer, I was quoted R595-00 for the exact same keypad. They installed the keypad and within 90mins it was non-operational. We phoned them Monday 9th June to come out and are still waiting for response.