Cartrack tempered with my vehicle electric wires after installation.

I regret accepting the new device to be installed. I received call in April regarding the new device. They tempered with my vehicle electrical wires. I took the car to the dealership they told what is causing the problem after stucking twice. I called cartrack in the morning requesting them to send the technician till now.When I follow up I'm told they are sending email to escalate the matter. As we speak my car is not drivable. The consultant told me to use other alternative transport" we are sorry for the inconvenience " . If you receive a call from them telling you about this new device DO NOT accepting it it will jam your car. I'm so frustrated with this company they are big ****mers. Soon after accepting that device to be installed they called me again selling Roadside assist I declined. Guess what? did I not stuck the following day? Lucky I have insurance. They're pushing sales and they don't care about customers. When I was reporting this matter they were selling me another product . I'm a using public transport because of them. Their service is pathetic. I can't wait for my contract to end July I'm definitely not renewing