Useless call centre agents and service

I recently bought a 2nd car for my wife and noticed that the vehicle is loosing power. I logged a call with ADT as I have a tracking unit with them, upon their arrival they found that there is another tracking unit in the car that is draining power. I called Cartrack and received confirmation that it is their unit. after numerous calls to their useless call centre and getting transferred from pillar to post from my Cellphone I was eventually transferred to the technical department where I was assured that a technician would be sent to take the unit out. it has been 2 weeks with no confirmation none whatsoever. I have called a number of times asking to speak to a manager or sup but call gets transferred back to the IVR by all their call centre agents. I DEAMAND THAT A MANGER CALL ME AND ADVISE ON THE WAY FORWARD AS I WILL BE TAKING THE LEGAL ROUTE IF NO FEEDBACK IS RECEIVED.