Bad service and shocking attitude

ADT twice came to repair the system in the last 3 weeks. Both times we were charged, both times the system is still faulty. I phoned to complain, was promised a manager would phone, and nobody phoned. Last Thursday at lunchtime I received a sms sent at 10am that ADT were on the way to the premises. Nothing was arranged with me. The alarm problems continued and on Saturday I again phoned, technical dept was closed and was promised a manager would call me at 9am on Sunday. No call. I phoned at lunchtime and was again promised a manager would call me the next day (Monday). No call. At 17H14 I receive a sms that ADT would attend to the problem on Wednesday (tomorrow). But I was again not contacted to arrange the appointment, and will be unavailable. What do these people think? That I must just take off work when they tell me to? Are they paying for the days I already had to take off and all my phone calls? Shocking arrogance