Dewan Housing Finance Corporation [DHFL] — Excess amount being charged

This is in regard of my complaint against dhfl. The company has a system of charging the emi in the month starting rather than the month-end. I closed my loan on the 5th and still i am being forced to pay the emi of the entire month disregard of the core amount being deposited. Logically an interest of only 5 days should be applicable. On bringing forward the issue to dhfl they say that the system updates itself on the 25th of the previous month. This is a scam and money-making business by troubling the consumer. An extra amount has already been charged on another loan as well and they are trying to get profit out of this one by fooling.in spite of providing all possible sources from my end, dhfl is not cooperating and refusing to return my documents and closing the loan.
Kindly look into the matter and help me get my documents. I am being forced to fall into the trap and pay the money which i am not liable to. I hope the solution is not biased and the decision is made keeping all parameters under consideration.