Bajaj Finance — call from bajaj finance

Address:

Mumbai City, Maharashtra, 400092

I received a call on my mobile today morning from bajaj finance, claiming that i availed a loan and male voice from the other end was calling to ask me for updating my adhaar credentials.

When i cross questioned, as i already paid my monthly instalments in full, and as on date there is no any outstanding, i asked him for more details. But he insisted for the details on the phone, while i told him to submit the request in writing.

The caller number is: [protected]; time of the call is: 12:04 pm on 20th april 2018.

Questions:
1) how a third party knows that i availed a loan for consumer goods
2) how am i receiving otp, while i never contacted and browsed any numbers.

Screenshot for the otp msg received from bajaj finance is enclosed herewith.

When i cross questioned the caller, he started using filthy and abusive language. I deplore such calls from esteemed and reputed companies like bajan and request for strongest action for such calls.