[Resolved]  HDFC Bank — regarding negative balance in account

My salary account (In hdfc bank) was created in my school, so due to some problem i left the school . Now my salary account in hdfc bank has been converted to savings account (Without informing me or warning me) in the month of ocyober i had called customer care and raised a request to close my account as i did not want to use the account and they did say that they will follow up with the request and close the account. After that i never logged in to my account through net banking. I logged inn 10th januaryr 2019 and i see that i have rs -2139 in my account. I request you to please take action against this bank.. Thay have no right what so ever to do whatever they want without informing the customer