Leaked information

I have requested Wesbank to supply me with a report of everyone who has worked or had access to my account in the past 3 months. They keep phoning me for other things. I keep asking them to provide me with a report of wesbank staff whose had access to my account but they are not. It's a concern to me that my personal family information was leaked and wesbank does not take this seriously. This is my 2nd request for it. Why are they reluctant to provide me with this. Leaked information is a serious offence and it placed my family in a position where I don't feel they are safe.