BATTLING TO CANCEL NETSTAR TRACKER WITH DOTSURE FOR 2 YEARS!!!!!!!!!!

I had vehicle insurance with Dotsure in 2016. I opted to have the tracker system from Netstar put in my vehicle. I cancelled my vehicle insurance due to some unforseen employment issues. I have not rejoined with Dotsure since. I have been trying to cancel Netstar and have not had ONE call regarding the cancellation. The only calls I have had is to pay!!!!!!!!!!!! I DO NOT WANT NETSTAR IN MY VEHICLE ANYMORE!!!!!!!!!!!!!!!!!!!!! Natasha from Dotsure was supposed to phone me. She claims that she has tried to call me, but I have not had a single phone call from her on the number I have provided her THREE TIMES!!!!!!!!!!! I demand a phone call TODAY to arrange for an uninstallation of the Netstar AND for a refund IMMEDIATELY!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!