Shopvista Epay Kerala — cash debited from my credit card via fraud call

On date i got a call date 23.11.2017 around 5 pm onward stating that they are from sbi credit card divison and they were telling that the existing card of mine would be changed shortly with higher credit limit, for which they required confirmation of my card details card number only. They also said there would be a ivr call in which i would be required to key in the three digit number available on the back side of my credit card. They also said that my card was having rs.8499 odd reward points which i can encash/purchase etc and the same would be transferred to the new card being issued. Finally they said a otp would be generated which i need to key in ivr and i tried doing the same, it failed. Once again they came back and asked me to key in the new otp number generated in my mobile number. They also gave an option that they would key in the otp on my behalf if there is any difficulty. Believing them to be genuine officials i gave the otp, immedietly my there was an sms stating that rs, 8499.00 was spent on your sbi card no. Ending xx5211 at shopvista_epaykerala on 23/11/2017. I request not to make payment to the merchant please.