What is the issue you are having with the screen, please?
Did you receive a phone call from another expert last night regarding this problem?
Does it work if you rotate the screen?
Ok, then when turned the normal way, that part of the touchscreen must be damaged or dirty.
Try wiping the screen with a damp cloth to ensure there is no contamination on it. Let me know if that works?
Ok, in that case part of the touchscreen has stopped working and it will need to be replaced.
If it is still under warranty then you can return it to Samsung for a warranty repair.
Samsung cover the phone under warranty for 1 year:
You can arrange the return by contacting Samsung at:
or call 1-***-***-****