Citibank — Harasment by Citibank to sell its products

Address:

Bangalore, Karnataka

I have a savings bank account in Citibank N.A, MG Road, Bangalore. From last 3 months I am getting calls from citibank to buy their products like credit card, personal loan etc. I have told them multiple times not to call me but they do not stop. I am really tired of it and dont know how to stop it.
Sometimes, they even call me multiple times in a day, when I am in meetings disturbing me. Also, they call me when I am on roaming, which costs me money. The number from which they call me are like:[protected] etc.

Somesh