Hey Reshmi,
When it comes to cosmetic surgery, you must choose the medical center carefully... you see, a beauty job gone wrong

can be disastrous. I would suggest you go to AMRI Hospital in Salt Lake. It is one of the best health care centers in Kolkata that I know of. The best surgeons are employed there and that way, you can lessen the risk of the surgery greatly. You must do a personal review of the hospital before finalizing your decision.
Take care, Sreejata Ghosh