Samsung Rv509 Notebook — manufacturing mistake

Address:

Indore, Madhya Pradesh

i have buy-ed samsung RV509 notebook last month, but web cam is not working from the starting i have complained it to samsung they have changed it but after changing it once it was also not working properly, and also in my laptop there are some marks coming in the body regularly due to manufacturing mistake,the upper LCD body and the lower keypad body doesn't have proper gap so scrates marks are coming i have lefted my laptop to the seRVice center they have changed the body but the result was zero again the marks are coming. i want to fire a manufacturing mistake case against samsung India and want a new laptop as a exchange.