Complaint... Money taken but goods not received

I used the credit on my smart shopper to buy food today at the pnp at victory park. It gets deducted off my card which I can see from my phone but the cashier says that the system says I still owe them the money. So we call customer service. All they say is yes we took your amount so we will fix it when we online. So pnp says to me... This isn't their problem. They would not help me. I walked out of that centre embarrassed and furious. So I'm short my money and have no groceries. It's shocking actually. I spend over r12k a month at that place. All pnp is worried about their money. Definitely not the customer. I am done shopping there. I will take my money elsewhere.