HDFC Bank — ach debit return charges

Money has been deducted from my account a total of ₹1769 in three transactions of ₹590. This amount was first on hold when i didn't have any money in my account it resulted in my account going into negative but as soon as money got in my account it has been deducted. I want full explanation what it is for and also i want the refund for it. I'm really unhappy about this as it has been deducted from the money which was very important for some personal use.