You can change the shipping address before your order is billed and shipped by calling Customer Care on Toll Free No. 1-800-419-6648 (8:00 am to 10:00 pm) or by mailing Shoppers Stop at customercare@shoppersstop.com.
Yes, you can cancel the order fully or partially before it is shipped. However, additions to an order, or changes to the item ordered, are not possible.