Terrible service

We installed Cartrack in our truck in January this year. Since then we have had to replace 4 batteries. We requested an appointment for a technician to come and check, and no one is coming back to us to make an actual appointment. Its also nearly impossible to make an appointment ourselves, after half an hour on the phone we ran out of airtime, after being put through to multiple persons and still not having an appointment. Before we installed Cartrack we had no issues with the batteries. Not only is it costing us a lot to replace the batteries but we are also losing income from the truck not working.