Letsbuy — Mfg date

Address:

Hyderabad, Andhra Pradesh

I was very apprehensive before ordering a 1.5 ton Whirlpool split ac 3 star rated from Letsbuy.com. They are good in all aspects but failed to deliver a good product. They delivered a unit made in Oct 2010, Can you beat that? I've ordered for this on 27Mar 2012 and got it delivered onl 14 Apr 2012, that's all fine but I can't digest this fact after unwrapping the package. The icing on the cake is I've raised this doubt before placing the order about the date of Manufacture. They quietly said that they sell only new ones. (New norms came into force from this year about their A/C ratings and all.)

What shall I do now. Should I go to the consumer court? Does the case stand?
I can quote all the mails also, the ones in which they replied saying they sell only newly made products.

Tx