Bad service

I am extremely dissatisfied with the technical service. I called on 17/09/2024 to book for my mother's alarm to be serviced. They confirmed that they will send a technician in the morning. Now it's almost afternoon and nobody bothered to call me and let me know that the technician will be delayed. When I call I am told that the technician will only be available around 15:00. This is bad service as I have taken my time and wasted a whole day waiting for ADT. Even the people I called do not show any interest in getting me another technician as this is not my fault. Up to now I have spoken to about four agents, I have their names.