HDFC Bank — I have no connect with HDFC but calling me for payments

I using office number from Dec'2014 onwards. When even i gets call from HDFC, i used to inform them our old employee left the company and i dont have his contact details.
Today i got the call from HDFC telecaller. I told her that Mr.Aman Malik was left the organization and i am using that number from Dec'2014. She starts blaming that i am lying. She threaten me that i will get continuous calls till so called Aman Malik clear his dues.
Tele Caller No. [protected]
Time: 12:36,[protected]
On: [protected]
I started recording the call from middle of the conversation.