Unauthorised debit orders happening!!

Im writing this very frustrated!! Im sick and tired of this insurance debiting me unnecessarily. Its the 2nd time they doing this I have a cover under value added products for JUST tyres and rims which the premium is 82rands something however they always debit me 200rands under this cover which i don’t understand why !! When i asked them to amend , they cancel the cover without my consent!