Paytm Mobile Solutions — about deduction from my bank ac

Address:

Patna, Bihar, 801113

Tranction is done on paytm mobile solution pvt ltd without my permission. How its happend. Amount is 1261... I never credited my balance into this... And i didnt share any type of otp to others. There was a otp that came in my mob and suddenly a message came that the tranasaction is complete into paytm mobile solution. I want refund.. It is deducted by my bank