[Resolved]  HDFC Bank — Money Deduction in the unknown transaction

I have a savings account in HDFC which was opened by my current company which has the permit of zero balance.Recently my account balance was zero and it was showing in negative (-2349).When I transferred Rs 3000 in the account it is now showing Rs 649.Now where is my rest of the money gone? I am trying to contact to the customer care number but unable to talk to a bank agent as it is saying due to covid 19 restrictions we are operating with limited number of staffs. Please resolve this problem as soon as possible.