scam

I had put a cycle for sale on OLX. At the time of payment, he mentioned some credit card payment and told me to scan a QR code and the payment would come through. I received 1 rupee, then he sent a QR code for 5500 which didn't scan, then he sent one for 2000 which also didn't come through. Then he said that 2000 must already be in the account for the payment to come. When I refused, he started threatening to involve the police and said my card would be blocked and my name would be implicated.