[Resolved]  Wonderchef Home Appliances — Problem in pan of the company

I have bought purple colour pan set of the company and when i bought i was told that it has life time warranty and the products are of good quality. I was told to use wooden or rubber spatula and wash it with special sponge given to me when i purchased it. But now the thinks which i cook in it got stick to its base.
What is the solution now.