Axis Bank — They charged me negative balance weather I am still using that account as my salaried account

One day I noticed my account balance is in minus. Then I tried to reach out to axis branch near my home location. They told me you have to maintain a minimum balance in your account if you left the job then after 6 months that salaried account will turned into savings account and for private bank you have to maintain 10k. But I informed them that I am still doing a job and using that as my salaried account then how can you charge me minus. They told me this is the rule.

This is really rubbish that I'm doing a job and still using that account as my salaried account but still they are charging. Please do investigate this otherwise I have to close this account. This is really ridiculous - AXIS Management