Samsung Electronics Co. Ltd — worst mobile quality

I bought galaxy s4 last year on 4th of may. few days before my display wasn't working and i noticed a internal crack in display. their was no external damage. I went to the service centre and i was charged Rs6480 for changing display. I said i have not damaged my phone than why i am charged. And how can it happen itself only without any external damage. I got the answer that as you keep your mobile in jeans and jeans are tight it creates pressure when you sit or do any other activity. And so its a damage and therefore my warranty is not applicable. I am really feeling cheated as this very common problem of s4. By searching through internet i came to know people have filed this problem and samsung is giving ADH in 16 countries for S4. But not in india. If we buy so expensive and then also this is the product quality than I must say samsung was my wrong choice. I was thinking of buyingS5 for me and my sister. But we won't cause after seeing this product quality and service. I am really feeling sorry for buying this product and recommend everyone not to buy samsung as their quality is very poor. You can't carry their mobile. it is made to use in home and keep in showcase. my register id of phone is [protected]@gmail.com. please give me the proper reply against this post of my grievance