State Bank Of India [SBI] — Without proper information bank debited my account

Address: Katihar, Bihar, 854105

Website: state bank of India

My account no
[protected]
Bank has deducted 46 rs frommy account for not maintaining minimum available balance in my account.
I didn't know my branch is urban or semiurban.
I didn't know how much minimum balance i had to maintain.
After 1st april didn't inform me about minimum balance.
Even when my account has less they didn't inform.
I m paying amount for sms banking too but regarding minimum balance i didn't receive any message.
Directly they debited my account.
I was thinking i had to maintain 2000 that's y i was maintaining that amount.
Even bank didn't inform me about minimum balance i could have maintained that amount too but instead of informing about minimum balance bank directly deducted my account.
I m paying charges for sms banking too i m receiving all messages for transactions but didn't receive any message regarding minimum balance n deduction of minimum balance.