Sadly - don't be too surprised at the incompetency of bank employees or the lack of real security.
Last year (end of July) someone "hacked" my chequing account. They called up the Banks phone support and with minimal publicly available information managed to get the person on the phone to cancel my card reporting it as lost/stolen. They additionally got the minimum withdrawal amounts increased to the max possible.
The following banking day went into the bank and another bank rep handed them their own card.
End result: in a 3 day withdrawal spree they took out roughly $3,800 before the banks software security mechanisms detected the abnormal activity and locked the account. I found out about it 2 days later when I went into a branch for a transaction. The teller indicated the card I was using had been reported lost/stolen - that raised red flags given I hadn't done that. That night I logged online, put together the sequence of events and the following day raised an issue with the police and the bank both.
So... don't be too surprised if someone can contact a bank as a secretary and acquire info even if that is absolutely against security practices ... assuming the Bank has that as a security practice.
Also Sadly: even though I've followed up with the police I have not heard the tinest peep from them. The bank did refund most of the withdrawn amounts (the missing points were 3rd party fees for ATM withdrawals).