Prestige Smart Kitchen — non functioning of mixer grinder

Address:

Bhavnagar, Gujarat

I bought a mixer grinder from the shop Namrata.in Bhavnagar in April 2014.its warranty period is for two year.the product never functioned welI.I took it to the shop they repaire.But after every ten days there is another fault in the product.So now i am tired of this.again now it is in the shop..why should anybody buy a product which is not helping in work.therefore tell me what to do? Bharti srivastava