ICICI Bank — amount debited from my credit card account

Dear sir,

This is to inform you that some fraud transaction is done on my icici credit card

Details are below
Pay back wallet-rs20000

I got a fraud call from this no.[protected] on 15th sept at 5pm as calling from icici credit card for small verification for redeeming my points

After few minutes i started receiving messages about the fraud transaction
I request you to stop this transaction and please initiate refund into my credit card account as i am middle class person

Looking forward for positive response

Regards
Deepthi