[Resolved]  HDFC Bank — salary account in negative

I have salary account in hdfc bank and i have ecs for lic in my salary account which is to be debited from my account on 15th of every month.

But due to some reasons i am not able to maintain balance in my account on ecs due date from past 4 months.

Now my account balance went to negative and i cannot see anything in account statement the reason for negative amount.

Do we have any charges for no balance on ecs date.
My account is negative for -6635 now.
Pls help