Problem reported phone was not powering on

I purchased a sony ericssson mobile phone from sony world, Hazratganj. After using it for some time a problem occurred that phone was not accepting charging, it was under warranty I got it to the sony ericsson authorised service center i.e. SONIC INFOTECH, first floor Faridi Building, Maqbara road Hazratganj LUcknow-1. telephone number 9839226600 e-mail [email protected] they repaired it and after use of few months the mobile phone started problem and it cant power on. This time again on 18.10.2008 I went to above service center as the mobile phone was in warranty. The employees at the service center gave me the job card and receipt of the mobile phone where in remarks column they wrote Dead, physical conditions of the set was not good. After two three day when I went to the service center for collection of my mobile the companys employees said that set could not be repaired and the repair cost is 85% of the cost of the set and there was water in the set. Whereas at the time of taking the phone for repair they have checked it and found not no signs of water or moisture in the set. Since then I am running from pillar to post but to no avail. Kindly take my case.