bad service

I am very disappointed in the service i am receiving from netstar, i bought 2 new cars on saturday the 5th of june took a new contract with netstar for my tracking device . 1 unit was supposed to be moved from my old car and put in the new car, and a new unit to be installed in the other car, i have been calling since monday . no answer , i have sent emails to *** no response . now i am feed up and want to cancel both contracts if units not installed today