mobile defect

&lt;p&gt;&lt;b&gt;Location/place&lt;/b&gt;: Bangalore&lt;/p&gt;<p><b>Name of company/service</b>: karbonn</p>I brought a new karbonn a9 mobile in ezone which is located at cosmos mall. From the date of purchase it: s having some defects. When I told to them they are telling that we can’t do anything. What should I do