Limit decreased by rupees 10000/- on my credit card of sbi simply click and too without info. what should i do now?

[surajkumar1901]

Hello everyone I am a sbi simply click credit card user and suddenly I got to see that my limit was decreased on it from my orignal limit. The deduction was of Rs. 10000/- and that too without any information no emails no sms no calls or anything. Please give me suggestions on what to do now and how can i be able to gain my limit back.
I am a student only so I don't know how to deal with this so please help me everyone if anyone can.