Olx and Paytm - Digital fraud olx qr code

I was selling electronic items online and I got a call from buyer. He said that he will send a person to buy it. I said OK. But keys are not available with me since we are living in native place and items are in Bangalore rented house. Extra key is also not there. So I had told him that I will call him once we come to Bangalore. He said OK also. Next day he called again and he told that he will do advance payment so that I should not give it to other buyer. I said OK. He sent scanner code to scan it. He sent for *rs initial how does it work. I did *rs sent and credited back. So he sent again for ***** first time. I scanned. Money got deducted but didn't receive back. He told me to twice so you will get it. I did believe second time also and scanned again. Money got deducted from my account. And this time he sent scanner for *****. I said enough. I said him to pay me back I don't want to continue it. He didn't listen to me. Please help me to get my money back. Please find the attachments which he sent to me.