standard bank app doesn't work

My wife tried to withdraw money from a standard bank atm in denlyn today using my card while l was in the shop where they had said we needed to get cash to pay for the staff.She inserted my atm card into the atm but she felt it was stiff as she tried to retrieve the card someone quickly came from behind and pressed something quickly and within minutes the person disappeared. She still thought the card was in the atm .she requested a phone from a passerby as l was with both my phone and hers and she called me to contact standard bank.l quickly opened my app and locked my card and walked to the atm to call standard bank ***** line.To my surprise on my way to the atm l saw 3 amounts of R3000 ,R800 and R40 that were withdrawn in quick succession.l called standard to block my card and order a new cheque card .My reference number for this is ***.My question is how did these ******** manage to withdraw money from my account when the cards are locked on my app.Also how did they manage to increase my atm withdrawal limit as it is R3000.lm now sitting with no food ,no fuel and no money for stationary which l was meant to buy tomorrow when lm off. SO why do we have a tool that doesn't assist at all.l was told l will get feedback in 3 days but what am l going to be eating until then,l dont have fuel to go to work on monday due this.Please assist asap