SBI — Debit Surcharge and MAB

Sir,
My money has been debited without informing me by bank and when I was opening my account they have not clarify that it will be deducted and it was zero balance account then also every mouth some amount of my money has deducted and in passbook it has written that MAB DEBIT but my account is zero balance than why is my money being decucted 17.70rs and when I go to sbi branch they have not give me any proper response and say due to low balance it happen I want proper response or help