ICICI Bank — Unauthorised debit amount

Address:

Bangalore, Karnataka, 560017

HI
My name is venketesh babu, I am having ICICI Bank account saving
My account number[protected]

Today MAY16 2017 3:50PM
9235.00 amount is debited from my account without my knowledge, I don't know how it got debited

In the statement only below details are present,
25 16/05/2017 16/05/2017 IPS DB -04/02/2017-_NUANCE BAN 9, 235.67
But this transaction i didn't do

Desirable resolution : Request refund amount