Phone [Q] Touchscreen problem

Hello everyone. I have an old problem with my i9003's touchscreen. There i a part of my touchscreen that do not work. It affect me while while in some apps ore while texting because i can't press on "p". Below i made a picture. all that is in the right part of the screen after the green line is no working, neighter in landscape mode. I read over the internet and found that my screen culn't be calibrated corectly, but i don't know how to calibrate it. If you know a fix for this problem, please answer me.
Attached Thumbnails
Click image for larger version

Name:	Screenshot_2014-01-04-16-42-09.png
Views:	708
Size:	38.4 KB
ID:	2493763