That is strange they don't supply the 3 pin grounded plug in India. I wonder why? Apple doesn't normally read/reply to these forums, so one way to get the message to them is product feedback here:
I don't know anything about what the outlets in India are like, but note that the same issue exists here in the US, in a way. The adapter has a 2-prong, ungrounded plug attached directly to it, but you can remove that plug and attach the extension cable (which has 3 prongs) that comes with every machine. Did your MBP not come with something like that? If not, I'd contact Apple directly.
I agree that it sounds like they need to be providing the right plug if they aren't, but unfortunately posting here won't help. These forums aren't a way to communicate with Apple. The feedback page tjk gave you would be one way, but it's a bit like dropping a coin in a fountain... you could wait a long time in vain for your wish to be granted.
I'd advise trying to call Apple back and try to escalate the problem to a higher level of support. See if you can talk to someone higher up who might have the power to do something for you.
In the meantime, can you get a surge protector to plug the MBP into?
Doesn't your macbook pro come with a couple of different 2-/3-pin plugs with the option to swap them out? Mine came with the UK (the fat 3-pin BS-1363 plug that could double as a weapon), and the US (2-pin flat) plugs. The UK plug coupled with a simple adapter for the 3-pin round Indian power socket should work.
The UK plugs we use look like this:
and here's the adapter:
Your best bet would be to call Apple and ask them to ship you a 3-pin plug, if that doesn't work you'll need to order from the UK site at www.apple.com/uk
If that's not workable, then you'll need a surge protector. If that is unworkable and you don't want to order from the UK, I've seen some shops sell magsafe equivalent adapters with 3-pin connectors that should work, but these are non-Apple products. However these were about 1/2 the price of Apple's adapter.
I am in India and that is what I have been given in the extension cable that should have a 3rd pin for earthing. I guess some king of a connector based pin goes into the earthing section shown here but couldn't find anything at the hardware stores.
my macbook is giving static so high that it leaks into peripherals. when i answer calls from my iphone 5 connected to usb to my mbp, i get tiny shocks in my ear!
I have been facing the same problem on my MacBook Pro for a year now. I got the surge protector and it works fine. It won't totally eliminate all ground charges, but 80% is reduced. Wearing a rubber slipper or any other shoe also helps . It feels way more comfortable to use the device now with the surge protector.