Ubook X i5 touch inaccurate only lower half of screen

My Ubook X just had an inaccurate touch on the lower half of the screen.
On the upper half of the screen, it seems normal but after gesturing down from half screen to lower it slowly shifts to the upper of my finger.

And I have a problem touching the taskbar I need to touch the lower out-of-screen area.

And here is my model

Can anyone help me fix this?

Additional information.
This problem happened after I tried to use my old HiPen H6 but it didn’t work.
So, I followed the instructions from this post, my H6 is able to be used but it is cause of the problem as above.

Is there any calibration software available in the package? Just curious.

Hello, i asked and we do not have any calibration software the only thing would be install the drivers for the Pen and touch panel