Horrible service

I have been with Netstar for 3 years and never needed them and everything was fine. Until I now bought a new car 2 weeks ago. Netstar have come to install the tracker in my new car a week ago but I am still only connected to the car I sold 2 weeks ago. I have called and called and called to request that the old vehicle be removed and new one be added but no success. I have requested the fitment certificate almost every day for the past week and I get told it has been sent and I will receive it in 15 minutes but I get nothing. So now for the past 2 weeks, and going forward, I am not insured for theft or hijack because I am unable to provide my insurer with proof of a tracking device. All things to consider when trying to decide which tracking company to go with and I wish I hadn't renewed my tracker with them.