Bad service

Asked them how many times to change the main phone number they call to my number, after they said it is changed and the alarm goes off I am not phoned. During the night if one of the outside beams are tripped, I recieve no phone call or someone that comes and checks. I have tp phone them every time from my side to tell them the alarm went of, the one time I told them I am going to test and they must say if they recieve a signal and I tripped the alarm a few times and they said they recieved no signal, but the other time i pressed the panic button they saw a signal. I was told that they would send a technician to site but no one came. Eould not recommend signing up with them