Please knwo that as per your requirement, you can start booking the advertisment through the following page: http://thestatesman.releasemyad.com/rates/announcement. To proceed simply choose the edition as Kolkata and create your advertisement on the Compose Ad page.
Please ensure that the ad is booked at least 2-3 days before the intended release dates and the payments are also cleared by then through the online or offline payment mediums.