So as I can see, the touch is not working at a specific line point, which indicates that it got some accidental damage, and you need to replace the display panel.
Visit a Service Center, Your front panal (Display and touch as well as frame) needs to be replaced. If that's a out of warranty case, you can look for any new phone to buy. This may cost around 12-15k so choose wisely.
Please perform the below mentioned steps to resolve the issue:
* Check rebooting your device.
For further assistance, register your concern in Samsung Members Application (Open Samsung Members Application > Get help > Send Feedback > Error report/Ask questions).
