State Bank Of India [SBI] — complain about unknown transaction on credit card

Address: Ghaziabad, Uttar Pradesh, 201102

Website: google

I was searching on one video chat website named coomeet on 30/09/2017 at 11.00 p. M.. They asked me for membership for 2 usd.. I put my sbi credit card number as website had asked, but i didn't receive any otp and sbi duducted 59.88 usd (Around 3900 inr.) i just want to know how it's possible without otp... Customer care is also not available on sunday, now what i have to do?? I want to complain against sbi as they are permitting anyone to debit from my card without my knowledge and otp...
My card no is [protected]