Vijay Sales — Defective product received

Address:

Vijay sales piplod, surat

We had purchased a Faber cooktop from Vijay sales. At the time of purchase we were not informed about that the coating on cooktop would get removed once the cooktop is heated. However, we were only inform that stands were of brass and of good quality. Only after 5 days o[censored]se the coating started to get removed and the stand of the cooktop turned from black to grey. When we inform the same to the faber technician and Vijay sales they told us that the coating would get removed when exposed to heat. However we argued that the work of cooktop is to provide heat and cook the food and from day one it would definitely be exposed to heat.
Please help me either replace or refund the product.