I`ve tried to fix it with both soft and hard reset. Didn`t helped.
The thing is that i can use screen normally, but after too much touches or if i put phone in the pocket with screen touching my leg, it simple stops responding. I guess it is just some service error inside the phone, but so far i couln`t find out how to fix.
Hard reset didn`t helped either. Thought it will, but it must be somehting inside the phone or simply screen is bad. My phone never fell down nor i droped it or hit something with it, so i gues its just software error.
Best thing might be to just go to Microsoft store and give it to them to fix it.