Citibank — cancellation of indian oil credit card([protected])

sir,
I m receiving the bill from your bank for above card, but i m sorry to say that i have never applied and not received for the same.For regarding the payment several times, i m receiving phone calls from your bank and everytime i m requesting that kindly stop sending me the bill and cancel the card.
but nowadays threaten is given to me that bank will pickup me or my family.for this matter i met with your bank person Mr. Harshit on 19 nov.08 with the application, he has given me assurance that he will resolve the matter and that i have to pay Rs 1000 for the settlement and i will get the No dues letter from the bank, i was angered for the same.
from 20 nov. daily i m asking for the letter no correct answer i am getting, one day he told me that letter has come and his man Mr. Ravi Rana will delivered the letter to my house on dated 24 nov.and also Mr. Ravi Rana told me the same.but still i have not receive the letter.
nowadays i am mentally disturbed, so kindly resolve the matter.
yours sincerely
Nawal Kishore Thapa