Poor service

On the 3rd of March ‘25, a new anti jamming device was installed in my car. Soon after that I experienced power shortages whenever I start the car, called them and they said they will send a technician to check the car but didn’t show up. I called again the second week, same promise that they will send someone. On the 20th of March, my car could not start so we took out the battery to have it checked. No one called to say “we notice that someone is tempering with your car” I took the initiative to call and ask how do they operate because it’s been 30 minutes since i removed the battery but no one has called to check if I’m ok. It’s been days since I reported the incident and no one has responded to my emergency.