Indianoil Xtrarewards — sudden deduction of points

Address: Kolkata, West Bengal, 700040

My name is prabal dutta, mobile number [protected] and xtra reward card number [protected]. I had 374 points in my card and today when i went to redeem 334 points for 1 litre free petrol i suddenly realized that my 374 points are no longer in my card. I have even marked the redemption history that i have done on 7th jan 2019. I haven't redeemed the point then where is my points? Please return back the points that i have earned or i will definitely take a step against indian oil rewards points section as i have proof of non redemption in my statement.