Indian Overseas Bank — hacked my sb a/c and rs.20217/- transferred.

Address:

Koraput, Odisha, 764001

I am a sb A/c [protected] in Indian Overseas Bank, jeypore branch. As usually I have downloaded my monthly statement and found that some one hacked my account on[protected] and transferred of Rs. 20, 217.00 to hdfclife with out my knowledge & authenticate. I think Bank Officials are responsible for fraud, because for this transaction i've not received any message on my mobile or email nor asked for OTP. So pl. Help me and do the needful to refund my amount.
BALAJI PANDA