Mobikwik — fraud transaction on my father debit card

Address:

587314

Hello sir,
This is praful m, my father got call from fraud person number [protected], saying that he is calling from sbi bank, and asked my father to share otp, so my father unknowingly shared otp on 11th april 2018, and amount of rs15000 is debited from my dad account. Kindly help us regarding this fraud, kindly reply to my mentioned email id. Thanks.
Date of incident-11th april 2018
Fraud person number - [protected]