Avon Bad Service

I use to be an Avon rep and decided last year that I would no longer be selling so I paid them and forgot all about them until I saw that I am marked as red meaning I am in arrears on the Credit bureau with Avon for apparently not paying them, I called them on the 14/09/2018 and they advised they they actually owe me as I paid too much, but I am listed on the Credit bureau for not paying isn't that funny that the individual still carries the bad name even if the company owes them. Anyway I asked them to refund me and clear my name with the Credit bureau and I was told to provide proof of payment, i told them that I no longer had it as I paid at Shoprite, they told me to go to absa as they will be able to assist, I went and was told because I paid cash they cannot assist as they cannot trace the payment. I received a paid up letter from Avon but still no refund and MY NAME HAS STILL NOT BEEN CLEARED WITH THE CREDIT BUREAU, I am still struggling with this matter, I call and email them on numerous occasion and still I am penalized for money that is owed to me, I have been patient with them but I am so tired of this now. I need answers and a solution NOW. I will not refer anyone to be a Avon Rep.