shocking service

I contacted Netstar on the 2nd March 2016 to have the my tracking device tested - the first time since it has been installed and as recommended by Netstar. After more than 2 weeks with follow up emails and completing their online feedback form and posting on their facebook page , I still have had no contact. How do I know that a tracker was actually inserted in my car ? Should my car be ****** and they are unable to trace it , I will hold them liable. This is unprofessional and the service is shocking