Inconclusive Results

In Last year I emailed Standard Bank advising them that I have a suspicion that one of their employees that work in the Insurance claims in Constantia may have accessed my bank account. I requested that they Investigate from October 2018 - May 2019. The feedback I received was not conclusive and I feel it was not given their full attention. In November 2018 I changed my bank to First National Bank where I get notified of any transaction which seems out of the ordinary. As I explained to Standard Bank even if the person didn't transact on my account what would the reason be for a claims consultant in their short term insurance call center need to go into my bank account. The person in question has all ready made attempts to get information on my medical aid fund which I have taken up with said provider.