Bad service and no response from C-Track...

Since 26/11/2014 we have been trying to cancel our contract on one of our vehicles with C-Track as the car is written off and we were told that was the procedure to follow by a Customer Care Consultant, after several e-mails because we did not receive any response from them at all. We have also been requesting for a technician to come out and have a look at one of our units that's faulty early in 2014, needless to say still no call or technician has made contact with us. We replaced a battery on a third unit at our own cost cause after several calls and requests no one has once again assisted us and we had to replace the vehicle battery cause the C-Track battery kept on draining it. No service regarding technical problems, wonder what the service will be like when my family is in trouble and the car needs to be allocated? If you can't live up to your promise then don't offer a security service to the public. Wonder how long it will be before we get a response regarding our complaint?