Colmed Debt Administration - Unwilling to Help Customer, Arrogant Debt Administrator

I have been having issues with Lesley Prins, the Debt Administrator since before June 2020 to pay debt on my account. He is unwilling to help a customer and is very arrogant. I've made all my payments as per my agreements with him and just received notice this morning that I have 20-days to pay my account (which is already paid) before I will be handed over to the Credit Bureau. His argument is that I have used the incorrect reference number, although I have sent through the proof of payments each time. Capitec is very complicated with regards to setting up a reference number, which I have also mentioned to him. After numerous calls with him, I have requested to speak to a manager or supervisor, but he informed me that she will say the same thing and that she is also not availible. I am really fed up with this pathetic service and the Debt Administrator being unwilling to help me. I am trying to and feel that I did my part. Basic customer service would really be appreciated.