Debit Order Went ahead even when I cancelled the application. Did not accept the policy.

Today Discovery insure debited my account for the car insurance that I quote for and cancelled the application. They contacted me through Blue Mercury Financial services. I decided that I will stay with my current insurance and instructed Blue Mercury Financial services to discard my application. They kept phoning me between September and October to arrange the cancellation of my existing insurance. I kept on telling them that I'm not going to proceed with the policy from Discovery insure. This morning they debited my account with R2900 and R150 . The funds that were left in my account is for my medical aid debit order. I wonder if they will reimburse me and cover my penalty fee because of my debit order not going through. I would never recommend Discovery insure especially if they contacted you through Blue Mercury Financial services.