ICICI Bank — I'm complaining about money deduction from my account without any prior notice

Address:

4-90, Meedha Veedhi, Dondapudi Village, Ravikamatham Mandal

Dear sir/Madam,
I have been charged Rs. 826 as DMC/IN[protected] DP CHGS TILL OCT-23 without any prior notice and I haven’t done anything, I didn't even know that my bank is having dmat account, Please help me to understand the issue in detailed statement.
And this is the not the first time, last year also I got deducted same. That time only I requested bank to close the dmat account