Vodacom does not live up to being an authorised financial service provider

I have spent numerous months of emails & phone calls trying to get Vodacom to update my information at the Credit Bureau. I closed my account (or that is what I thought I did, my account is still open) in April 2019, Vodacom said there is an amount of R231 outstanding, when the balance is paid then they can close the account. I paid the outstanding amount on 29/04/2019 and the payment shows on the statement I received from them. With my last communication I had with them on the 21 May 2020, they said it is updated at the credit bureau and the account is closed and will reflect within 7 working days, I just check my credit report and it has not changed. My account is still active and it still shows after more than a year that the money is outstanding even though your statement says I paid you more than a year ago.