Sony India — mobile phone problem in warranty period repeatedly

Address:

Coimbatore, Tamil Nadu

Hereby i inform u that i have purchased a brand new sony xperia miro on mobile shop on 24th aug 2014, i used my mobile for one week i had a mobile restarting problem i send my mobile to sony service centre they update OS and return my mobile, but still problem persists, after few days i send my mobile to same service centre they hold my mobile for one month and returned mobile after replaced total circuit panel. but still problem persists so i finally sent my mobile to same service centre and asked for replacement, they told they asked sony for replacement waiting for approval but aim still waiting. please refer my purchase bill and job sheets for more details. i kindly request you take suitable action and made me to get proper liability. please kindly do my needful.