display and touch screen damage

@rohitlohiya touchscreen and LCD are a fused unit. Going by your description,you have to replace the display assembly. Since iFixit does not yet have a guide, you want to use this one to replace your display assembly. The assembly is readily available at plenty of online stores, but you need to ensure you get one for your specific model 710F, J710FN (EMEA); J710M (LATAM); J710H (South Africa, Pakistan, Vietnam)

While you work on your phone, take lots of pictures. Once you are done with it, take those pictures and create a guide for iFixit. That will help the next person that has the same problem as you do. It's easy and fun to create these guides. https://ifixit.com/Guide/new The iFixit community will appreciate this.