ICICI Bank — fake call about recovery lapsed reward points and asking for card and persona details

I got a call from the #[protected] saying that they are from icici bank verification department. They told that i have got 4000 rewards lapsed last year worth 8000rs. (I didnt understand how 4000points can worth 8000rs :p). So, the call went like this -

Icici fraud: sir, you have 4000reward points lapsed last year worth 8000rs, if you verify your details, you can get that amount.
Me: how madam, i have used my debit card for last 3 years for any shopping and i didnt spend so much that i can get 4000points..
Icici fraud : no sir, you have used.
Me: is it? Ok.
Icici fraud: your details pls - name, dob, type of card, card expiry dates?
Me: why do you need expiry date madam, these details are in your bank records.
Icici fraud: for verification sir.
Me: answered all details with my wrong date of birth :p.
Icici fraud: well sir, can you tell me your cvv number?
Me: why do you need madam?
Icici fraud: ofcourse - for verification sir.. You neednot worry sir, i cant use you card until i have your pin number.
Me: is it so, can you please send an official mail for this verification process pls?
Icici fraud: hmmmmmmm...,,,,,,
Me: madam are you thr?
Icici fraud: hmm.. Sorry sir, i cant do that until i get all your details..
Me: sorry - i cant give you those details until i get a mail.

Call gets dis connected,,,

Dear icici bank,

Please take strict action against these fraudlent calls please,