Listed as a default

After I took out the vehicle finance loan, I changed my bank account. Even though I notified Standard Bank in advance about the change of bank account, they failed to do it on time. So the month, I paid manually, and the second month, Standard Bank ended up taking double payment the following month. All this is well documented. When I spoke to the person helping me, I told them my credit report reflects as having missed one payment - despite the fact that I had made a manual payment - they told me that it will be fixed. Now I see my credit report and it says I have 2 missed payments!!!!! This has negatively affected my credit report. I will report this to the Ombudsman if it is not sorted out. I need those two defaults removed from my name IMMEDIATELY