I need my money and that was my last cent I have in my account and yet now they go to home and come back tomorrow

Shoprite liquor philippi. Am in philippi Shoprite liquor I’ve been standing here for my QR scan parchase now I can’t go because they say my transaction is not approved. where’s in my bank app my money is deducted and they refuse to assist and I wanna go home and it’s late they must also go home