Very unhappy with lack of service from ADT

I started my contract with ADT in December and I am already regretting signing a 24 month contract. I was guaranteed that the response time is within a few minutes and that when my alarm goes off, I will be called AND armed response will be sent simultaneously. I have just had my 3rd occurrence of receiving a phone call saying my alarm is going off and they will send someone. After 20 mins of hearing nothing, I call the call centre just to be told that no one has been sent yet!!! On the 2 previous occasions we also waited for well over 20 minutes for someone to get there and when they do, THEY MAKE MY HUSBAND WALK IN THE HOUSE FIRST! I previously asked that a manager call me back and it never happened. I have lodged a complaint now again and will wait and see if anyone calls. Unfortunately, I am now stuck at work, not knowing if my house is ok or not. I don't feel safe with ADT at all and don't see why I should be held to my contract if they are not keeping up their end!!! Really unhappy. NICOLE OMAR