Citi Bank — credit card rewards fraud call in the name of citibank

Address:

Hyderabad, Andhra Pradesh, 500081

Today morning i got call from this number "[protected]" and they asked me below questions

Caller: you have Visa or Master card
Me: I have Visa Card
Caller: They said you have reward points for rs 4795 and you have outstanding amount around 10000
Me : I asked them from Which bank your calling
Caller: They said CITI bank
Me: later i said "I don't have CITI bank cards" immediately they dropped the call.

I noticed lot of voices behind that and its look like some BPO.