Incorrect information on credit report

I have paid my FNB TEMP LOAN on time more than two months ago .

I have logged two complaint with them where they then sent the paid up letters to yourself to update my credit score.

I have also sent an email myself with all required documents and paid up letter however it still shows as two months behind only with you guys .

I have had no response to mails or to calling the call centre .

Not sure if even complaining here will help ?