Appalling service by Fidelity ADT Security in Cape Town

Since Fidelity ADT Security in Cape Town installed an alarm system in my home more than four months ago, I have only had appalling experiences with the company, ranging from their installation, technical assistance, maintenance, monitoring and telephonic customer assistance. The problems that I am experiencing with my alarm system have still not been resolved. They include the alarm not activating when it's supposed to; when the alarm does go off, it does not deactivate i.e. the alarm continues to go off until I get home to switch it off; monitoring does not call me back with feedback after I have asked for an armed response unit to be dispatched. Their staff including managerial staff, social media staff and sales consultants are unresponsive. They do not return calls or respond to messages. One of their technical managers and inspector informed me that they think the problem with my alarm system may be software related and that they would follow up at their offices and get back to me. This was about two weeks ago and I've still heard nothing. I've called the manager several times - he does not answer his calls and has not returned any of my calls and messages. When I called about their phone app not working properly, one of their managers admitted to me that they do not know how the app works. So the company is selling clients an app that they know little to nothing about. I've paid thousands of rands for this alarm system and thousands more in phone calls and time that I have had to take out of my schedule as a result of a faulty to poor working alarm system that was installed by Fidelity ADT, which has still not been fixed since it was installed by Fidelity ADT four months ago. This is the worst customer service that I have ever experienced in my entire life. If anyone out there is contemplating using Fidelity ADT, my advice is to stay as far away from this company as you can.