My honest advice for you will be to buy a new touch front pannel and enjoy the phone. Here are a few links, you can buy using credit/debit card and even Skrill.
It seems you have only broken your screen and the digitizer is intact (not sure). If yes then you can get a new screen for less than 2,200 ruppees. You can buy one here: BLUE Outer touch Screen Glass Lens for Samsung Galaxy S3 i9300 digitizer + free tools-in Mobile Phone LCDs from Phones & Telecommunications on Aliexpress.com (comes with complete kit, scredriver, screws, prying tool, so you can open your phone your self)
If you are needing full assembley, it will set you back almost 16,000 ruppes. You can browse for competitive supplier here: Wholesale galaxy s3 touch screen - Buy Low Price galaxy s3 touch screen Lots on Aliexpress.com
*AliExpress is the best Chines wholesale supplier shop online which features thousands of diffrent suppliers. It is secure as you pay AliExpress, they hold payment until you receive the shipment intact, than you say OK and they release payment (if not you tell them they take 10 days to verify and refund the payment, happened to me once where china post lost my parcel in China, the supplier sent a new for free). Suppliers are honest as well. Look/ask for free shipping via China or Singapore post. All parcels delivered via AliExpress are not opened by customs and usualy dont have duty (unless over $500). I have ordered over 20 items from this site, from car lights, laptop screen, keyboard, jewelery, and kids toys
EDIT: Its unlikely that you need a full assembley as you have not burned your phone, so not more than 2,200 for you.