HDFC Bank — reg: harassment by hdfc

I received a call on Wednesday i.e. 13/02/2019 from Mob No. [protected].
the person on call said he is talking from HDFC Vikaspuri Barnch or HDFC Recovery Department.
He asking me about a defaulter case Mr. Jugnu urf Jai Verma who has been defaulter of Approx. Rs. 150000. And he is unreachable and asked me for help to finding the person. I also agree to help and asked to call me by 8:00 p.m. but he didn't call me. And on the next day i.e. 14/02/2019 i was in my training class so that i was unable to pick up the phone my phone was off. so. my call diverted to my sister's no. and the HDFC executive rudely speaks to my sister saying that meri abhi 10 minute me baat karvao nahi to mai uske office me phone kar dunga, and he did.
And the Above Said HDFC Executive harassed me by calling me as fraud even he call on my office no. where i am working and regarded me as a fraud to my employer saying that i ran away with the Bank's Money.
my Reputation in my office after the said call gone down, everyone seeing me as a culprit and fraud.
But i want to know that how my reference without my consent or confirmation and ID proof, any Bank Branch entered my name as witness of the Defaulter person.

And now i am trying on the above no. for multiple times but he is not picking and attending my phone.

Kindly do needful action, because its a matter of my self respect in my office and employer.

Thanking You

With Warm Regards
Sudheer Kumar
[protected]