Sony India — XPeriaZ water damages without falling in water

Address:

Ahmedabad, Gujarat

I have bought sony Xperia-Z mobile on September 2013 and after 9 month vibration is not working. I have checked with sony service center. they told me its water damage so it will void warrenty. But my phone never fallen in water. i dont know how that paper become pink. Service center person check port and one of port paper has become a pink. Other papers are white. So I cannot understand how this happens. Please suggest what i do??? Regards, Sabbirali