VCCB - Dispute Unbelievable

I have recently logged disputes with VCCB and received the worse possible service and responses from them. My dispute was about a debt that has prescribed and incorrect payment information as I have not paid it in the last 3 years.The debt was written of in 2021 and sold to a third-party recently and list with VCCB. So i have sent them evidence /statement which they reject without giving me an explanation or reason but accepted a statement from the third party which i disputed and provide evidence. They told me if I am not satisfied with the outcome of the dispute upon resolution by the credit bureau you can lodge a formal complaint with the NCR for further investigation. I mean really, how is it that you can accept a statement from a third party but reject the statement of the consumer. Still waiting for them to explain this. Experian and Compuscan have removed it but VCCB simple refuse and basically telling me to stuff- off if I am not happy with the decision.