ICICI Bank — icici bank undue dp charges

I am facing problem of DP charges from ICICI Bank.

Suddenly ICICI Bank started charging this undue and un-agreed amount (called DP Charges), from Sep, Oct 2017, without any prior information.

At the time of opening the account, Icici bank never informed me any such charges. Now suddenly i found that they charged me some charges under the head of DPharges.

This is completely unethical, and a breach of agreement.
We being small level of common people, we are taken for granted by Big banks like this.

This is a very serious issue and the Bank shows sign of corruption.

Pls help.