Poor Service

I am writing today to complain of the poor service I received from your company on 24 March 2023. I was visited by a Technicians of That Awful Company, at my home that day. After I call them since December complaining about Alarm Keyboard that is not working, from December their came in March and technicians install the keyboard without the SIREN, Since March until now, I DO NOT HAVE A SIREN, I am most annoyed that I call them 10x and nothing has been fixed, I'm so angry and tired.