Tommy Hilfiger — Backpacks

I brought tommy hilfiger backbacks from myntra online shopping on 7th june 2016 by giving MRP 1399 Rs.after 3 to 4 month i use very nicely.but after this one day the stitching of backpacks were coming out.
And I really wondered that the international brand like tommy hilfiger has cheap product.And this bag has one year warranty.And i went to tommy hilfiger store.And the workers were lifted their hands.I did n't know what i want to do.
And finally i repair myself by using flexquick gum.Even i did nt get any response from thier