Poor FNB service when it comes to changing business address that FNB got wrong in the first place!!

I have struggled for almost 1 month to change my business banking address. The COR 14.3 form that was submitted to FNB has the correct address, yet FNB chose to enter a random address. I have spent almost 1 month trying to fix this via online banking. I had to engineer my own solution to make the call centre solution to work. I managed to finally update the address via online banking. How is a "technically savvy" bank be struggling to persist the changes on the monthly bank statements????? Even after updating the address via online banking, the monthly statement still shows the random address that FNB inserted.

This is disappointing. Please fix the address promptly as I require correct data for operations.