HDFC Bank — session timed out yet money debited from my account

Tried to withdraw money from atm in mysore road metro station at 10.50 am. Unfortunately cash did not dispense and session time out message was displayed on the atm display.

After few minutes when i left from the place i received debit message on my mobile for the failed transaction.

Tried to talk in person to the bank customer care but no luck. Sent few emails with required information but was able to get only automated reply.

Please help me get the refund as inconvenience happened from the bank's end.