Irritated by appoling service

<p>I do not have a credit card with standard bank, and my home loan is currently up todate, I have been receiving mesages from MBCDS acting on behalf of STD bank regarding overdue account, I went to Festival mall branch to investigate, the consultant confirmed that it was not my account and could not get hold of MBCDS to assertain? She advised me to call MBCDS to investigate or clear my name/number</p> <p> </p> <p>1. What kind of service is this?</p> <p>2. Why hand over wrong information?</p> <p>3. How secure is my information with your bank?</p>