change of ownership

Hi wanted to change the ownership of my adt system. I called the call center an they sent me an sms confirming a sales appointment with a mr mpiti. Adt sent me 2 sms' s one for 4pm and one for 4:30 for the 23rd dec. On the 23 at 4pm I called him to find out what time he will be here. He told me my appointment was for 5:30 pm. An I was wrong for my time. I told him ok I'll wait. He did not pitch he called at 18:47. Telling me he is at my address. I had already left and reschedule for the following day after 1 but not after 5. He agreed. I still called him at 2pm to find out if he is still coming. And he told me his got meetings and will see me after 6. I am very irritated that im being inconvenienced waiting for someone who does not pitch. I even called there call center. The gentleman was less concerned of my complaint. I chose adt because of there friendly staff in the past but now I am disappointed on how badly I'm being treated.