HDFC Bank — Excess late payment and bouncing charges

Address:

South West Delhi, Delhi

Hello Madam/sir,
Namaste,
I have taken a loan from HDFC bank, the repayment was via ecs. They have presented the ecs only onces,but due to signature mismatch(as they said) the ecs was not honoured. For that they are imposing Rs.1600/- for 3 ecs. Is this genuine to pay. Please advise, also please suggest if any remedy left with me.

Thanks and regards
Biswojit
New Delhi
[protected]@gmail.com