For Product Delivery, you to select either air cargo or sea cargo services. Here we use international shipping companies such as FedEx, DHL to deliver products on our doorstep. Find out should these companies provide shipping at your address. Provide your manufacture your pin code. These companies bring product from china to India and also take responsibility to clear it from customs but here they will require your KYC documents. These companies will also pay customs on your behalf and when they come to deliver product to your door step then they will take all the custom charges from you which they have already paid on your behalf.
>>>I guess your dry port will be Delhi, not Kolkata.