Terrible service

I joined ADT on the 18th of April 2024 when I was looking for a car tracker, they installed a tracker that comes with a panic button in my car. In December 2024 the system gave me a problem, I realized when I took of a battery terminal but here was no any alert. My first enquiry: I wrote them emails, they responded to say the relevant department will contact me, I waited for a period of two months (December 2024 and January 2025) without any call nor email. My second enquiry: In February 2025 I texted them on their WhatsApp number, they just blue ticked me. My third enquiry: I searched for their contact number and called them, I explained the challenge I have to the consultant, she said she will book a technician for me the following week (18 March 2025), I waited even to this date no technician that has ever came, no communication, no nothing. I regret joining this company when I want to cancel they say they will charge me R2000 for cancelation, I pay every month for service that I do not receive!