Sell of bad guitar and amplifier and not providing after sell benefits

&lt;p&gt;&lt;b&gt;Location/place&lt;/b&gt;: New delhi&lt;/p&gt;<p><b>Name of company/service</b>: Amrit musicals,lajpat nagar</p>I’d purchased an electric guitar ibanez grg 170dx and marshall amplifier(mg 10cf) from amrit musicals lapat nagar..these guys first sold me a bad guitar nd amplifier and they are not providing any after sell benefits.instead when i take my amplifier to them for repair they charged me repair amount instead of warranty.i also spend approx 2000rs for repairing my guitar….i request for apmle actions over these frauds