Appalling services from ADT

I subscribed to the ADT service for the alarm, I was told the technician will be here between 8:30-9 am today the 17 July 2024, to install the alarm. I did not receive any confirmation after the call from Tanya. I called the customer service today after 9am calling to confirm if the technician is still coming and how far are they. Bizana from customer services said the technician just left the premises (this is at 9:05 am), no one bothered to inform me. I can't help but wonder if this is thr service I'm receiving, what more should I need help. Rather I cut my losses while it's still early rather than being sorry.