[Resolved]  Samsung — Not giving warranty and charging money

sir
I purchased a Samsung galaxy grand quattro I8552 just 1.5 months before. I found 2 days before that its battery is not getting charged. Next morning on 16/08/13 I went to service centre of samsung (ANSH Communication, Gurgaon) and got reply that " liquid logged in " and whole motherboard will be changed. Its cost would be around 4000 to 5000 rs . I discussed that " how is it possible because i take care of it so much and there is no water traces in mobile.They showed me some whiteness and told me that it is because of water logged in. As a non technical person how can i come to know the problem by seeing it .
Sir ,here I would say that , this is because of product malfunctioned . Samsung service centre people want to make money and changed problem from technical to water logging . It is the easiest reason ( water logging in ) to make warranty void and make money by service centre people.
i am confident , using this product very carefully.
sir , although I given my mobile for repairing on same service centre and paying repairing cost , because I am missing lot of important calls daily .But what would be possibilities for me to take further action on company after repaired phone.

Raman manhas
Bill no.[protected]
Model no :GT-I8552RWAINU
Mb no : [protected]
[protected]