I am a senior citizen and feeling scared because I am getting OTP from 57171 daily since 11th Dec 2017 though there is nothing done from my side. I suspect someone is trying to cheat me. Calling BSNL customers care was of no help. Issue is serious. Please look into the matter urgently so that no harm is caused to me by some fraudulent person. I am getting OTP daily 3/4 times. I am apprehending someone is trying to cheat me . Please advice how to identify the sender and what action can be taken. Please help.