Why should I trust you?

We recently renovated our house and ended up replacing the entire alarm system and cabling. On the 10th of November 2021 your technician came to install the transmitter linking our alarm with you guys. He was unable to complete the installation because after connecting the transmitter the keypad displayed funny characters and wouldn’t respond at all. He suspected that the keypad was the problem. I told him that I didn’t agree, because if it was the keypad, I should have been able to arm the alarm with the remote. The alarm did not respond at all. He insisted and told me that he was quickly going to pick up another keypad to test his theory. I waited the rest of the day for him, but he didn’t return. I took the next day off from work and even cancelled a meeting, so that I could be at home in case he comes back to finish the installation. He did not show. So, on the 12th I phoned you guys and asked what was going on. The lady told me that she would phone the technician and have him phone me back. That didn’t happen. So on the 17th I phoned you guys again. I explained the situation to the lady again and told her that I was unhappy with the service I was getting. She told me that she would phone the technician and then she would phone me back herself. I told her that you guys haven’t kept any of your promises, so why should I believe that she would call me back. She insisted and promised. Guess what. She didn’t phone back. I phoned her back the next day. This time she actually gave me the technician’s number. I phoned him. Hê explained that he was struggling ti find a keypad and that he would phone me as soon as he managed to find one. Since then I got my alarm installer to come check the system. Turns out that the alarm’s motherboad (not the keypad) was blown. They replaced it and my alarm is working again. But today is the 28th of January 2022, and I still haven’t heard back from anyone at Interactive. The transmitter installation is still not complete and it doesn’t look like anyone is attending to it. Now, I would like to know two things. When are you planning on finishing the installation and more importantly… How do I know that when something does go wrong, that you guys are going to show up then. You have literally broken every promise you have made to me. Why should I trust you to help me when I push the panic button? In fact… I am still trying ti figure out how you will gain access to the premises, but let’s leave that discussion for another day.