Looking for a Paid up letter and rectify my credit record

Capitec is disappointing me. 2012 September I took a loan, 2015/ 2016 capitec handed over my account to their debt collectors BLAKE ASSOCIATES. Last year 28 November 2022 I paid up their settlement amount of R1653 till today Blake Associates they never update the payment with NCR. It always shows I missed the payment. I ask them to send me a paid up letter so that I can update NCR on my own they promise to send it via email as from 7/03/2023 till today. I have been calling from PILLAR to post no one seems to be willing to help me. On the 11/ 04/ 2023 I called Capitec investigators under their Credit department as they said the investigation will only take 7 working days. When I called them to ask how far are they with the investigation after seven days they say I must not call them they will call me. I can see they sleep with one blakent with Blake Associates. Please help me on this regard as I can't buy even a thing because they block my credit record. I even have the proof of settlement payment with them.