Chase Tracking a **** and Compuscan not helping

Can someone help me get hold of this Chase Tracking company? It has been more than 2 years trying to close my account with them with no luck but still, the account is accumulating amounts that I have to account for. I paid-up the account in 2019 and asked for the account to be closed, suddenly I see this as an adverse on my credit report with an amount of R4000 outstanding. Mind you, firstly I was never informed by the company that the account is due and secondly I raise a dispute with the consumercare@experian and all they have to say is they request a paid-up letter which I have emphasized many of times that the Chase Tracking company does not respond to any of my emails or calls. This has been the same up and down request with the Compuscan with no way forward. I do not know what to do anymore. If the Compuscan and not see these people as ******** and ruining people's lives then it means we are doomed to pay these people while our lives are getting ruined. I am at the end of the road with this account and have no one to assist.