Nedbank adding false information on credit report!

I was just checking my credit report and Nedbank listed my petrol card for August 2018 and October 2018 as 30 days in arrears.

I am sitting with proof of payment for the account for the listed months as 30 days in arrears? Because of that my credit score took a dip and shows in my credit report!! Who will fix this mess and who will be held accountable for listing IN CORRECT AND FALSE INFORMATION on my report?