Debit order diapute

I regret having to take cartrack. I have struggled to cancel my contract with them since last year and that put me in arrears. In Dec I made arrangements for the arrears but I was triple debited. I then spoke to Chantelle Dube and asked to pay the arrears via eft. She told me they can't cancel the debit order. So that means I'll have unpaid debit order and unpaid debit order charges because they don't want to cancel a debit order. I finally spoke to Msizi Mbatha he assured me that by cancelling the contract there will be no debit order going off my account, but guess what. I still have debit orders by cartract even though the contract is cancelled. I'm incurring unpaid debit order charges since last year because of cartrack and this is affecting my credit score. They debit on dates I have not agreed to, they change debit order amount anytime they feel like it. I'm also gonna log a complaint with the ombudsman. This is an unfair treatment as a customer. Who must pay for these unpaid debit charges only because they don't want to cancel.