Do not go into a contract with Cartrack.

I used cartrack as my service provider as a tracking company about 4 years ago. Before my bakkie was sold I was called regarding my contract. I was told I am out of contract and will be on a month to month basis. In 2022 In September I sold my bakkie. I notified Cartrack. They are still debiting money from me. I started to reverse the debit orders and ever since they will call daily requesting payment. I asked them about +- 40 times to go back to the telephone recording of the day I canceled. No one upto now gave any feedback regarding the call. They started a debit order that can't be reversed and still send me letter of how much I need to pay. About a month ago a lady from contract department phoned me again to confirm my cancelation and confirmed again over the phone that I owe them no money. Now again they are debiting my account. They are mailing me blacklist letters. How can I get this ************* company off my back.