HDFC Bank — Request for refund of wrongly deducted charges by hdfc bank

Dear Team,

I am writing regarding my account [[protected]], which was originally opened as a salary account through my previous employer. At the time of account opening, I was informed that there was no requirement to maintain any minimum balance.
However, over the last three months, I have noticed deductions totaling more than ₹7, 500 under the category of “non-maintenance of minimum balance.” This has come as a shock, as such charges are not applicable to salary accounts
I have attached screenshot of my bank statements for your reference.

While I am no longer receiving salary in this account since I resigned from that organization, I was never informed about any conversion of the account type or the imposition of minimum balance requirements. These deductions therefore appear to be unjustified.

I request you to kindly check with the bank on refund of the entire deducted amount at the earliest and confirm me the current status of my account

I have been mailing to them but they have denied refunding the amount, please I request you to check on this as 7500 is a big amount to me

Thanks and regards
Shahid