Is this a scam guys?

I went to a cricket turf last night (HitNRun, on Kalapetti road), and paid 20 rupees for a drink by gpay. The guy showed a different QR Code that's not stuck on the wall of the "cafe" and this number shows to be owned by a woman. Today morning I was sent 700 rupees from that number and now they're demanding me the money back. Is it true or is it a scam? Something feels fishy.