Touchscreen top half unresponsive

After taking apart my phone to replace the battery, the top half of the touchscreen doesn't respond to tapping or scrolling.

What is weird is the phone thinks the middle of the screen is the "top" so i can still scroll down to my notifications panel but i have to scroll from the middle of it. Same goes for scrolling down to refresh a web page. But anything that requires tapping on the unresponsive half has no work around.

Is this a full replacement or is there a way to calibrate the screen?