Brink's Global Services review: Brinks residential monitored alarm system

I have been a customer of Brinks and the company they bought out for over 20 years. We moved in 2015 to a new house and have never been able to have good alarm service. Brinks did an upgrade to our alarm system in January of 2022 (the cell portion of it). After setting of the the alarm accidentally a few times we noticed we were not receiving phone calls from them to check to see if it was a false alarm. So I called in November of 2022 to speak with tech support. They said the update done in January of 2022 did not take. So, essentially we did not have monitored alarm service for all of 2022. I tried to schedule them to come fix it as they sent me a mailer saying that an update was do. They cancelled the appointment twice. I then told them in December to cancel my service we were done. I also asked them to refund the money I had continued to pay through December because we did not have monitored alarm service. Now they are calling me 5 and 6 times a day saying I owe for January and February. I have repeatedly told them I am not paying any more money to them because our system in not being monitored. I have called and tried several times to them to speak with a manager or supervisor and I repeatedly get transferred to another agent who cannot help.