Will with FNB - Poor Service.

I am trying to do my will with FNB online, and the first page that comes up is a personal info page. And at the top of the page, it says "If any of your personal details have changed, help us to update your details by visiting your nearest branch or by speaking to your banker." My personal details are incorrect so I have gone twice to the branch to have them edited - I was in the area and it was not so much hassle to pop into the bank. However, both times I have been told that it cannot be done in the bank, and must be done online. The first time I thought I had just not read the information correctly, but I checked it and went back a few days later. I have just returned from the bank and I still cannot update my personal information online, I have been told that it can only be done online.