Axis Bank — Negative amount in Account increasing every month

Hi,
I had a Salary account with them which was not being used for Salary Credit after 2017. I had an ECS which I stopped an year ago giving an Application to one of the branches due to the same reason that they were charging me for ECS and the negative balance was increasing.
Even after stopping it, they are continuing to charge my account and the negative balance has gone too far.
Since one year the account is not in use. I visited a local branch as I was concerned about the Negative balance even they could not help me out and told me that this is the policy of the bank to charge.
There is no record of the amount they are charging in any of the statements.
I want to close this account as I cannot withstand the fact that unnecessarily I am being charged with such huge amount.
I did not expect Axis bank doing such things to their customers. Wont recommend this bank to anyone for sure
Kindly help resolve the issue.