Vasanth & Co — New Rice cooker.bought in one of your retail shop not working properly

Address: Vellore, Tamil Nadu, 631509

I bought a Panasonic Rice cooker on 01/01/2017 from a retail shop of vasanth&co in Vellore-632509. But, this cooker is not working properly. Even it is not meeting its basic need(work). When contacted with the retailer, he asked to check in with the service center. Then we went to service center itself. There he, said there was a minor defect in the instrument, which he said he changed it. But, even then the same problem is occurring and one more problem has come.(the cooker doesn't stays in cooking, rather it goes to warm mode). Need a new machine as an exchange or return it back. Now, what to do.