Consumer Redressal

I purchased a dell laptop with serial number 1rmj2z1 from croma stores lower parel on 8th july 2014 with a warranty of 1 year which should end on 8th july 2015 and I even purchased a 3 years warranty extension plan for 7000rs from dell but when I checked with the dell service center they told that my warranty is starting 4th April 2014 n ending on 4th April 2015 which means my warranty is 2 months less even after making repeated complaints to dell and the crom stores no action has been taken Please look into the matter its been more than 2 months they hav not taken any action