ICICI Direct — charges for demat account without my knowledge

Address:

Hyderabad, Telangana, 500055

Amount deducted from my savings account without being intimation and nowhere i agreed for demat maintenance then how the bank will deduct the amount from my savings account. I didn't sign anywhere or told the executive that i want demat. Without my concern no bank can charge the amount. Please tell how can get my refund by filing the complaint. It is a total fraud by the bank. It is against the rules and rbi guidelines no intimation. Transaction done without my knowledge. 812 inr. How can i get my refund??