Dishonest Call Centre Service

My alarm went off by mistake. the first call I got on my cell phone. I said everything was fine and gave my password. 5 minutes later another call saying the alarm went off again. I said everything was fine and gave my password. 5 minutes later a ADT guy arrives at my gate saying my alarm went off. I called the call centre and was told that according to their records the alarm went off twice and they only received the password from the ADT guy. That is a blatant lie. I will not pay for a call out that I did not authorise. Of course, you cannot get hold of anyone in authority at the call centre. So I am posting my complete disgust on a public site.