ICICI Bank — demat account created without my knowledge and annual fees debited from my account

Address:

Chil Sez campus, Keeranatham, Saravanampatti, Coimbatore, Tamil Nadu, 641035

I did not register for any Demat account services with my salary account. Last year I got call from ICICI agents for registering Demat services, but I refused to register it. Even after refusing so many times, my account is enabled with Demat and has been debited with Rs. 700 for Demat account annual maintantence charge. Why should I pay for Demat charges that has been created without my permission. Please kindly look into it and refund the amount that has been debited from bank end and close the demat account.