State Bank Of India [SBI] — credit card fraudulent

Address:

HIP enterprise, Patna, Bihar

Sir.. A lady called me today.. She asked for my credit card last 8 digits number.. I provided her.. She was mentoining she was from sbi.. As i was insisting her again n again.. Later she asked to type my cvv number.. And then asked to type the otp.. My account has been deducted a amount of 8000 rupees.. Now what to do.. Please help.. I have insisted that lady many times.. And she said that she was from sbi.. The card belongs to my mom.. She is 55 years of age.. So many transaction is only done by me.. That lady have called me from many numbers.. I have saved all her numbers.. Her number was even showing name of sbi on truecaller.. Please help sir. I want my money back.. Please help.. When i asked her dat money has been deducted.. She said dis is blocked.. And the money will only be deducted as emi of 330 for 24 months.. And it is compulsory for every bank customer to use dis.. From dis i will be given discount card.. Through which i will get 25% off on every transaction.. One body check up..3 days 2 nights domestic travel..2 movie tickets.. And 1 gift voucher worth 4000 rupees.. Please help sir