Faulty equipments

I'm absolutely enraged by the kind of service I receive from ADT. 6 months after installing the equipment it started giving me problems I booked a fault for a technician to come through after inspection was told the equipment needs to be replaced and ended up paying -R3500. A year later I'm experiencing problems again with the system and ADT consultants tells me I have to pay for a technicians to come through. This is a ******* service that I'm getting from ADT and I'm not going to stand for it. I'm a loyal customer who pays monthly fees on time and have never defaulted on payment.