SBI Credit Card — Unauthorised transaction in my Account

Hi, My name is Gopala krishna from Kochi My card no. 6419 As I checked my mobile Yesterday(16th Mar'15) I have received 4 messages from Sbicard which of the 3 messages were of validating my card by APL*APPLE ONLINE STORE, AT& T QD GLF, AT&T K004 9966 ESTOR and said my card was successfully validated. The fourth message was of Transaction o[censored]SD104.94 made on my SBI card by AT&T K004 9966 ESTOR. and another transaction of 120.22 USD was made . After a few minutes i got a call from Customer care that they are blocking my card Please let me know how can Sbi validate my Sbi credit card without my permission and allow to make transaction online without any OTP. Kindly do the need full. I here by declare that the above information is true as per my knowledge and I want my money back into my Credit card immediately. Thanks and regards, Gopala krishna [protected]