Bad Service from Customer service department.

I wanted to cancel my Tracking Unit with them as I just found out that the cover I have taken does not cover the App application, basically I can't use the App to track the car because my cover does not cover for that, which I was not made aware before, I was Advised to download the App. This contract is less than 5 DAYS, I am told I can't cancel, I need to pay cancellation fee first, for something that is less than 5 days?? Netstar is being unreasonable.