This post puts shame to a new level.
There is no excuse for having Microsoft Access database serving any kind of content in an online banking solution.
The funny thing is, that even the comment excuses seem fragile. They obviously just don't get it. The bank should not defend their position, but focus on changing it immediately.
So, they should fix this ASAP, then fire PR, then apologize.
Well-done David, for exposing what should never reach a production environment.