QR CODE FRAUD THROUGH ONLINE SHOP BY A FRAUDSTER

I have a CSC Centre/Cyber Internet Cafe. We also Provide Money Transaction & Digital Payment services. I have came to know Fraudster are going to Internet Cafe Shop and send QR code of that shop to his Friend and told him to make payment, and his friend make payment and he take cash from shopkeeper. After a few days when cyber complaint register by Victim & cyber team traces transaction then he finds transaction done on QR Code is the Cyber Cafe Then they arrest Shop Keeper. They tortured that Shopkeeper. And generally all shopkeeper don't maintain register and neither take xerox copy of Aadhaar card as a proof after giving cash. Neither they have CCTV Photo of the fraud, no phone number neither WhatsApp chat. Shopkeeper don't have any proof of Fraudster transaction related. And they proof Shopkeeper is involved. And at last they send shopkeeper jail. and Freeze their Bank Account also. Whose fault is in this case ? Please send your comment it will benefit to all Shopkeeper who deals Money Transaction works.