Standard Bank is very negligent and does not care about its clients

My colleague was de*****ed at a standard bank atm in Grassy Park. He entered the card and without entering the pin R3000 which was his limit for the day was drawn ,then followed by R5000 then R250 .All in 5 seconds. When he went to the bank they could not answer as to why and how that could happen without even entering the pin and why they could withdraw more than his limit in a day. They just said he must open a case.But im puzzled as to how can money be withdrawn from a bank without entering a pin ,then the bank has nothing to say about it