HDFC Bank Ltd - Account closure - HDFC BANK

I have a corporate salary account with HDFC BANK LTD . branch - Okhla Industrial Area Phase II.
Account Number :03371610014855
I need to close this account so in the month of october i sent the account closure form to the Home branch through courier and i spoke to Mr. Shubhashish Ghosh and he told me you have to send the closure form again or you can submit the closure form at any branch in Delhi.
I went to HDFC Bank branch at netaji subhash place , they refused to take the form by saying that signatures are not verified , then i went to HDFC BANK at sector - 8 Rohini and they also refused to take my form , instead they are saying you have to pay Rs 1600 to close the account.
The executive who opened my account told me if you need to close this account you dont have to pay any charges.
Thank You
Arun Gupta
Contact No : +919811670866