OLX scam

I have posted a ad for sell my old books , after some time I received a message on olx , in which the person is asking my phone no to buy my books . After that he called me and he ready to buy my books immediately. I have started feeling suspicious. And the he told me to scan the QR code that he had sent me to receive money. First of all he sent me a 2 rupees qr code to scan . As I scanned the QR my upi app is showing the QR code sender name as Received Money From and then I fully understand that he is a fraud