FIDELITY ADT - WORST CUSTOMER SERVICE

I terribly regret signing up with ADT! I only signed up in mid-October, and I have been unhappy with the service from the word go. I bought a property that had an old ADT security system, it seemed to be faulty because the alarm would just go off on its own. I was advised to buy a new system (which is costly), and I did so. Ever since the new system was installed there has been a technician on my premises once or twice a week because the new system is not working properly. As I speak a technician was on my premises to fix the system on Tuesday, 14 Oct, since yesterday (Wednesday, 15 Oct) the system has been offline. I called ADT again today to report the fault and they are telling me all technicians are fully booked until next week Tuesday. Why should I pay for a system that doesn't work? I WOULD NEVER ADVICE ANYONE TO USE FIDELITY ADT!!!