Somany Ceramics — vitrified tiles

I purchased 181 box plazo bianco tiles from somany sastha ceramics chennai. The materials are worst quality, after laying only we know that almost 50% of tile was bend in center. All four corners will connect, but the center will go up. Finally i send the complaint to chennai office. The dealer gave one gentleman phone no. His name is senthil. Hardly one or two times he picked the phone, then they send a person for check the tiles with manual measuring materials. Finally the company send the mail the bend is within permissable bend as per is standard. But client didn't accept the tile, he told to remove entire tiles almost i lost 2.50 lakhs rupees and i lost further business also.
What can i do?