Con activity suspected in Citibank credit card dep. Review on Citibank Visa Credit Card

My name is Ayan Chakraborty. I work with Samsung research and development, India, Bangalore. My salary account is with Citibank. So, I decided to go ahead and try for the credit card that Citibank was offering. They sent an almost illiterate person to collect my PAN card photocopy and my passport size photo. Unluckily, their application form had nearly 7 to 8 signatures that I had to do. Next day, a person calls up and asks for my account number saying that it is mandatory to be verified. Over the next 4 to 5 days, at least 7 persons speak to me over the phone and nobody has a clue who the other person is. At the end, I call up Citibank and come to know that credit cards are handled by some anonymous bodies and they have no control over the proceedings. They had no clue where my application was. Therefore, they have my PAN card photocopy, passport size photo, my signatures, my bank account number…….after which they admit that they have no clue who has taken these documents. This is some kind of scary business they are carrying on. Hope that they are not using these for con activities because Citibank has no clue about these proceedings carried on in credit card department.