******** debit orders from Cartrac

I have a contract with cartrack. I had 2 cars on the contract. 1 Toyota Tazz and 2 Toyota Avanza. December 2023 I asked the cartrack customer service to cancel the Toyota Tazz contract because I wasn't using it anymore and it was canceled. From January until July 2024 they were debiting my account for 2 cars, I only realized when they debited R987 and 2 days after R481. I then asked Fnb to reverse the amount. Then Cartrack started to call me that I owe them. I told them they actually owed me because I canceled contract for 1 car they told me it wasn't canceled because they couldn't find me when they called then my question was when they call me for the money they claim I owe them why are they getting me? Then I canceled the Toyota Tazz contract and it was done directly without them calling me. Cartrack must refund me the money they debited from January 2024 until August because the contract was canceled and they must stop debiting my bank account whenever they feel like my contract with them stipulate that they will debit my account on the 1st of every month. Sometimes they debit on the 1st the 31st the 27th which is a breach to the contract I have with them.