Google India / Tez — deduction of 15000 rs

I have transferred 15000rps to a bakery person by mistake but he is saying that i didn't get msg and i am not using google pay app, but amount has debited from my account please help me in this to resolve this problem how to resolve how can we get to know if we send to unknown person without knowing if we transfer some money to them. I have never come across like this.