Netstar cancelation ****

So I initially contacted Netstar on 3rd of September 2022 to cancel my contract the agent there was more interested in the details of the buyer to try and contact the buyer of my car to move the contract to and advised me that they will contact me back... They never did and they also did not cancel my contract as per my request. I then contacted Netstar again on the 21st September 2022 enquired about my request to cancel the contract and the agent advised that my request was never logged on the 3rd so they are only logging my cancelation request on the 21st. On 10th October another Netstar agent called me saying I owe them funds and they can't cancel my contract. I then contacted Netstar again and spoke to Lizana who confirmed that my contract has been cancelled, didn't say anything about me owing and I requested confirmation letter that this contract has been canceled. Oh well to date I have not received the confirmation instead I received I threatening sms to pay R387, 81 or risk being listed. So basically I have to pay Netstar for their incopetence! Or my name is going on ITC? All I want is my contract to be canceled. Ref Star136161