HDFC Bank — ACH Debit return charges

Address:

MBranch :- Mehdipatnam, No 122, 825 & 826, SGM Mall, aehdipatnm, Hyderabad, Telangana 500028

I was using HDFC Bank Past 10 Year or more than that for My salary Account,
How come HDFC Bank charges thrice in the name of ACH Debit Return Charges, I want to know the reason behind this.
I haven't got any information about deductions, Though I have checked In the statement then I got to know that I have been charged.
1.ACH Debit return charges[protected]MIR[protected]Rs)
2.ACH Debit return charges[protected]MIR[protected]Rs)
3.ACH Debit return charges[protected]MIR[protected]Rs)
Total I have been charged - 1770 Rupees