Broad Day light ******s

I had my alarm installed in my house November 2018, when they were marketing for the deal, they said to me, should anything happens to the alarm, it will be fixed at no charge. Last week, we got a message about low battery, called them, they arranged for a technician, which only became available today(No problem with that). When the technician arrived at my house, he told me that the transformer is also not working and they need to change it. How on earth can an alarm work without that transformer and battery?? Cause the subscription hasn't stopped. He told me all that is going to cost me R1500... What the hamster!!! Reallyy!! What happened to the lie they fed us? Of fixing at no charge?? I really feel ******...