Service not Cancelled after numerous request

I have sold my vehicle on 10 November 2020 and immediately requested my Beame tracker to be cancelled. I received our settlement amount email on 24 November 2020 and immediately paid the R300 settlement as per the email. I emailed my proof of payment to ***. To my surprise in March 2021 my account got debited with R86 which I reversed as I cancelled my contract in November. I am now blacklisted with R386 which is incorrect as I did pay the settlement amount on time. I have sent a lot of emails and tried phoning. To date this is not sorted. I hereby request that my account with you be cleared as I do not owe you ANY money and my credit record be cleared immediately. Please could I be emailed a confirmation that my account is cleared and a statement showing a zero balance and confirmation of service cancellation. I have 6 request reference numbers already.