Faulty alarm installed

The worst service ever. First they burglarised my house and no alarm went off so no response. They said i must fit in a new alarm system coz the old one is faulty, and i did fit in a new system from them and guess what,the new alarm system still has the very same fault as the one they had removed. Those **** technicians they bring in to fix the alarm always dont know what to do. Their service is nonsense. Dont sign up with them,you will regret it.