HDFC Bank — Hdfc-amb chrg inc gst charges for last 12+ months

I was in maternity leave and havent used my hdfc bank account for more than a year and when i checked my hdfc account last week, it was shocking to see more than 10000 rupees have been deducted from my account as "AMB CHRG INCL GST" . I havent received any email notification on this in las one year and was not aware of this transactions.
Please help to refund the deducted amount and going forward I will make sure to maintain the required minimum balance.
Appreciate the help.

Account Name- Leena Mani
Account Branch : Address :
PIMPRI - KAMALA CROSSROADS KAMALA CROSSROADS, FINOLEX CHOWK UNIT NOS 1 TO 4 AND 26 TO 29, A-WING OPP PCMC OFFICE, PIMPRI

Cust ID :36193528
Account No :[protected]