Nedbank Personal Loans record faulty information on credit record

Nedbank Person Loans Dept: I missed 3 payments during the Covid National shutdown period in 2019. Month 4 I made an payment arrangement with them which was added to monthly instalment to make up for these missed payments. I have not missed another payment or arrangement payment since then (2019), but Nedbank has registered all my payments since then to date as "Missed Payments" for every single month on my credit record to date. I contacted them and spoke to a very disinterested consultant named "Jordane", and was informed that the payments history could not be rectified by the bank as I was still owing arrears. I explained that only the months I missed should reflect on my credit record, and was told that Nedbank could not help me, I would have to sort it out with the credit bureau which I know to be untrue. As it stands my credit record has still not been updated or amended, and still registers every month as a missed payment for Nedbank Personal Loans. This is preposterous and I cannot seem to get any joy here, or get my credit record fixed. Terrible service!!!