Netstar, NO SERVICE..NO FOLLOW UP.....NO INSTALLATION DONE. TERRIBLE

My husband and I have contacted Netstar to install a tracking device in our car, we received an email that the installation was booked for Thursday 9th July, the installation has still not been done, We have contacted the call centre, we have contacted the sales person that assisted us Dezlyn Lolwane, but no one has returned our calls or even responded to our request......WE JUST WANT THE INSTALLATION. If we do not get a reply by Wednesday 15th July 2020 midday, we will be cancelling out current contract we have had for more than 3 years and will be cancelling this new contract we would have liked to have. Terrible service, terrible communication, terrible experience