HDFC Bank — Charges without warning

Address: Lucknow, Hazratganj

I'm a student pursuing my bachelor's, , i recieve 1000rs for my miscellaneous expenses, out of which hdfc deducted more than 500 rs, citing amb charges, how am I supposed to survive now for two weeks?. First they deducted 240 for the month of November as my account was below 5000 i thought ok I will maintain from this month as I'm going home, then they kept deducting more money citing various other charges going as far back as april, they kept deducting till my account balance was zero. My exams are going on currently l, how am I supposed to survive 1000kms from my home, I was given no warning, recieved no phone calls before deducting, they have properly ruined my life.