deduction of amout from the account without information

Location/place: pinjore

Name of company/service: pharma company

dear sir

i have an account in axis bank branch kalka haryana. my account no is 911010033351434. when i have opened the account at that time the minimum limit of saving account was at 1000/- but on 22nd of june 2013 the bank deduct my 500/- from the account without any written message to me. the send me messages on my phone number that your account has less amount. plz maintain the minimum amount. but how i could know why the send this message to me. when i know that my account has full fill the nature of 1000/- that was on the bassis i have opened. but when i asked about the matter they told me that your minimum amount was changed into 2500/-. sir plz tell me if no one tell me the new minimum amount how i get the idea automatic. im a poor person and my 500/- amount is so big to me. plz if there can b possible plz my amount should give back to me throw the consumer court.
thanks
sanjeev jangra