IDBI Bank — Didn't get the update regarding maintain minimum account balance due

Address:	Chhindwara, Madhya Pradesh, 480107
Website:	www.idbi.com

When i opened the account in idbi bank, my account opened as a salary account with minimum balance 0.00 inr. They changed the policy in july 2015 that customer has to maintain minimum balance of 5000.00 inr. But i didn't get any update regarding this. When i opened my account through internet banking i saw my balance is in minus. I visited the bank and asked about it and they said you would have get this information on your mobile number. But i didn't get any message. When i saw my mobile number in my account there was my mobile number with 11 digit. They didn't even check point in mobile number field that if mobile number is greater than 10 digit. That is not my fault.
They entered the wrong mobile number. Now they charged me 2400.00 inr as a fine. Now i changed my mobile number and i paid whole amount and request to close my bank account.
This is not my fault if bank entered the wrong mobile number, they don't have even check at mobile number field that if mobile number entered by bank person greater than 10 digit should not accept.
I want my money back.
Could you please go through this and help me out to resolve the issue and get my money back.

Account number: [protected]
Person name: afroz khan