Installed a device but broke my vehicle in the process.

I've been a Cartrack client for about a year, the service was amazing with sales and they seemed lovely and sold me the dream. The after sales service is horrific. I got a new vehicle and had to have them retrieve my old devices and install them into my new vehicle. It took a week for them to even get the device out my vehicle at the dealership. They installed the devices into my new car and I have had 18 calls in 4 days asking when they can schedule an installation (ITS INSTALLED), I get a call every night about my car being disconnected but nothing is disconnected and the interior trim of my vehicle was put back so badly that water comes through the door into the car when I wash it, it looks horrific and I've had no service to resolve it. Yet, I get a million calls about the payment they need for the installation and asking when they can schedule the installation. It's a joke.