Consumer Redressal

I have purchased a XOLO dual sim phone modle XOLO Q3000,MEI Nos- 911351050344246, 911351050395248.Mobile was working perfectly.There was only minor problem in charging jack.I had to give some weight near charging jack on charger wire to charge so I have submitted my phone at XOLO authorized service center(G-Infotech, K73-A,Ground floor,Kalkaji, Delhi)on 9th April 2015 under warranty.My work order no is- 310001280641,On 11th April 2015 I have reached service center, I checked mobile phone,I found mobile speed was very slow touch was worse I had to press very hard to perform my requst & mobile screen was blinking on bottom side like tube light (low & high)It seems it is not my phone.when I checked IMEI on back side original IMEI printed but by dialing code of for IMEI screen reflects different IMEI.Only outer body of mobile was mine and rest all the original part of mobile has been changed from service center repair team & turned it on dead,So I left phone there.I want only refund now.