pathetic service

Chubb installed a monitored alarm system at my premises about 6 weeks ago. Although I paid to have the system monitored it has never been monitored for a full week. I have called Chubb several times to have it checked and technician have been sent about 4 times now to fix the system or replace the radio or whatever. After each call the system works properly by a few days later it doesn't. If I set off the alarm no one calls or is sent out - no signal is being sent form my premise. I have reported this matter via email too Chubb assist, the promised to send a technician which still didn't. I have also sent an email to Andre Becker (the general manager) over a week ago, regarding this issue as well as the lack of decent service from his staff and I have yet to hear from him. What I am struggling to understand is whether substandard goods (the alarm system) were installed on my property or Chubb just has a bunch of *********** technicians as this matter has gone on long enough. Therefore I want to cancel my contract with no cancellation fee as Chubb has failed to provide me with the service that I paid for. I would also like a refund on the useless alarm system that I paid for.