Alarm faulty

I called ADT on 25 April 2016 that my House alarm goes off and it is not registering with ADT, i was promised that a technician will come out. No one came out so i called again on 26 MArch 2016 was promised a technician will be there at 09:00, to date no one has been to my property. Called into the call centre today again, i was told they could not get hold of me(ffunny i was waiting the whole saturday), so alarm still does not trigger to the ADT and i am told that they are now going to charge me R800 for a technician to come out, what am i payiing a monthly fee for?<br> Very upset and going to see if i can not cancell my contract with ADT