Being Blacklisted by Avon Justine

I settled my outstanding Avon account on the 15th of January 2020, which was never confirmed by the credit control, I wrote countless emails requesting confirmation that my Avon account has been paid in full and closed, I sent another email during during lockdown I think it was in April, I got a response that the credit control team isn’t working because of lockdown, they will send me the letter once the lockdown has been lifted, fine I waited- we went from level 5 to 4 no respond, level 4 to 3 no response and level 3 to 2 no response or anything regarding my request. Then in the first week of September I sent an email requesting the confirmation letter that my account has been closed and paid in full, I got the response with the paid-up letter attached on it.. I am thankful for that even though struggled getting that letter. However my name is still blacklisted or listed, I wrote two emails requesting that can my name be removed from being blacklisted or listed or be given advice on how to remove my name being listed because I wanna apply for a home-loan and my application has been rejected because Avon has listed me, after the bank has review my credit report the amount of R1600 is reflecting on my account, I don’t understand that means Avon didn’t update my account. This is sad because it’s not only going to affect my credit report but it’s going to affect my profile in terms of getting a job. This is unacceptable because Avon failed to do a simple task - updating the payment information. Thank you Peter