[Resolved]  Selling — Selling my product

Address:

Vellore, Tamil Nadu, 60001

Sir i sold my product intel dual core 2nd generation cpu with 4gb ram and 500 gb hard disk. The buyer called me and asked whether it is i3 processor i said no its not i3 its intel dual core then he agreed to buy it. I delivered my prooduct to his place. I told him to check the product. He chucked it and gave money. Now he is asking dvd writer which was not mentioned in my post. Or give 1500 ruppess or take the product since he his getting same product at 4000 ruppess near him. He is telling telling he thought it i3 that's why the buyed my product.
Please tell what to do why i should pay the money because of his mistake. I deleted my i'd and product