Ilegal Debits on Customer Account

I Took out a new contract for my Toyota Fortuner in April. The sales consultant Byron Gyser said he would cancel my old contract. No mention was made of a cancellation fee or removing the old unit to fit into the new vehicle. A few weeks later I received a call stating I owe Cartrack a sum of R1700. I mention to them the events which had transpired and contacted Byron as well. He clearly stated that it was an error and I did not need to pay that fee. He was under the impression he had resolved the matter a month ago. A few months later after being handed over to collection agents and explaining multiple times what had happened, the matter had still not been resolved. Cartrack has *******ly debited my account, without my consent. Their client services department has promised each time I call or e-mail to give me feedback but nothing has transpired. Cartrack you will have to resolve this issue and return the money alternatively I will have to report you to the Ombudsman regarding contravention of the Consumer Protection Act.