Unfair ITC listing

Absa handed over my account to an attorney after they cancelled my debit order without notifying me and the asset falls behind 2 instalments. I made arrangement with Absa who accepted and I stick to arrangement. 2 months later I was contacted by an attorney from absa stating I am 6 instalments behind. I mailed proof of payment to attorney , they verify that absa say they did not receive any money. My bank verified that money was payed over to absa. Judgement was filed against me cause I ignored their smsses and phone calls. A person called Nick harassing and threaten me on a daily basis and behind my back went to my workplace and denied it but later said he was at my workplace twice. I contacted attorney with info and him to tell absas guy Nick to stop harassing me. Next day I received email from attorney they handed my account back to absa. I contacted absa lady and made another arrangement which absa put on email as acceptance. Yesterday I request settlement from absa and today I found out via another finance institute that absa had put me on ITC and blacklist me. I stick to payment agreements, stayed in touch and now I am on ITC regardless all arrangements and payments I stick t