Corporation Bank — misbehave and threatening by security guard

Address:

F block Dilshad colony, delhi, corporation bank branch

Respected sir,
Today i visited corporation bank dilshad colony, delhi branch for cash withdrawal from account. There was que for customer for entering in the bank one by one, i was in my question from last 2 hours. But the security guard who is posted at this branch was sending the people at his choice. When i and some other people raised their voice against this, then he misbehaved with me publically and threatened me to face dire concequences. He threatened me like "tu mujhe nahi janta mai tujhe jaan se marva dunga". And he also said "tu mujhe maarega kya?? Meri marji mai kisi ko bhi bheju andar tu bahar nikal". I will tell the complete details when i will be contacted by any officer of corporation bank. This is to inform you that you should take strict action immediately against him otherwise i will take legal action against him so soon.
Kindly inform me after proceeding my complaint that what action has been taken by you.
Thanks
D. K. Sharma
(Advocate)