CAPITEC will not fix THEIR mistake.

My credit score has been negatively impacted by the absolute incompetence of Capitec. My loan was settled in full. Not a month later they listed a missed payment. After I sent them the proof of payment and their settlement letter.This has still not been rectified. The missed payment will reflect on my credit score for 6 years. I have asked them numerous times to fix this. But nothing has been done. Next step die the ombudsman.