Olx India — took my money and is not refunding

We posted an ad. He said payment he will do only through google pay or paytm. We dont use both. We tried to use google pay. He took advantage of our poor knowledge and took money from google pay account. He made us pay him 5000 on a trial basis. So now 5000 is gone from my account. And he is now refusing to refund or give us his address or contact proof or anything to get our money back. Product is still with me. But rs 5000 is gone. He says his name is anit pandya but on google pay it showed as ayub