HDFC Bank — Money debited with out reason

Hi,
I became a customer of hdfc recently
I could find that 499 rs is debited from my account.

Transaction :
Net PI to HSL Sec A-c 3731744-[protected].

I was charged so much money and i specially mentioned i don't require any demat account, i have contacted hdfc and i am not satisfied with the approach and further they said it is hdfc securities and demat charges which i informed i don't want and cancel and refund my money back.

Please find my account details.
MUVVALA KIRAN KUMAR
[protected]
HDFC0000642
SANJEEV REDDY NAGAR branch
Coutmer id:[protected]