HDFC Bank — Deduction o[censored]nwanted charges

Address:

KOTTUKKAL HOUSE,POST VALAPAD

ACCOUNT NUMBER [protected]
CUST ID [protected]
yes, this account had not used for past few years, we were using the credit card only. we were decided to use the account after paying the minus amount showing in the account and i have transferred INR 15, 000. after the negative balance in the account balance was INR 11000.
but after few days they have deducted a total of INR 6000 in the name of GST and extra charges.
We were not aware that we can register the complaint.
this is not acceptable at all to deduct the amount in some name after clearing the negative balance in the account.

we need the refund of the charges urgently. this happened in last financial year.