ADT frustrating service to new customers

I joined ADT in March 2024, they installed a alarm system that started failing, still waiting for technicians to come fix it....they dont show up on the times agreed to. Expensive equipment in our business building and I cant set my alarm at night, when the alarm goes off we get response 50% of the time.....I used to be a ADT client years ago and back then their service was much better....Conrad from Somerset west