Bank workers *****ing money for the banks clients

My mother got a call from the Standard Bank credit card ***** department and they told her that someone is trying to take money from her card so the lady said she can help her get the money back but she needs the card details so my mother been an old sick woman believing this lady and gave her the details and next thing you know the card is empty. The fact that my mother was wrong no doubt but the first thing is the call did not come from an unknown number from hilbrow it came from the standard Bank credit card ***** department so the banks staff is *****ing there clients money The second thing is they managed to take 15k more then the limit please explain that. And the third thing is the there where 50 transactions in two hours each at R1000 and there was no alert by card division to stop the card or to call the client. And to top it up the lady on the line at Standard Bank and I say Standard Bank as she called from the bank more then 30 time and we have it on record she had to be working there then cancelled the card so when my mother got to the bank they said they cant excess that account as the card was cancelled. So she must of known exactly what she was doing as a worker at the Standard Bank credit card ***** department.