Technical error drops score 9 points!

I have an account with GetBucks which I have diligently paid on time. I was in the middle of a vehicle finance application and my score has dropped 9 points and the factoring reason stated was a GetBucks account in arrears -Checking, I found out it was an amount of R14.00! Calling GetBucks to request a letter claiming their technical error, due to December adhoc pay dates, therefore adhoc debit collection - I was simply given a statement with the arrears amount removed. This is not only inadmissible but also doesn't rectify the damage done with the credit bureaus. I now have to accrue more costs fixing a problem I didn't cause - worse being that the technical error was never communicated, no apology issued, and no effort to assist in reversing the implications that such dire effects on my livelihood(I need a car for work) - the reason for lack of communication simply being this error happened on only a few accounts - so I guess did not matter. Please can my details on credit bureaus be updated immediately or can I at least be furnished with the letter stating the above to clear my name and motivate my application without the need to wait another 21 days without transport.