Yes Bank — nri account closure

I opened an nri account with yes bank 2 years back and all the formalities were taken care by email, and my documents were collected overseas where i live. Later when i started using their online backing i am not satisfied with the service, hen i tried to close my account, but there was no option to close teh account online, like they do for opening new account online/email. When i sent email, i got reply back saying i need to come to their branch and close teh account.
After 2 years i am getting email that my account balance is rs -11, 000 and i need to pay that immediately or else bank will be forced to make me pay..
Is this an harassment!!!

Now i sent email again requesting to close my account, i asked to visit the branch and submit the request. What? This is an nri account and you are asking nri to come and close the account by visiting your branch... Worst customer service.

Customer id : 2365331