If you're stuck at download mode with "rooted" message, do this:
Flash latest stock KDZ for your device with Flash Tool. It will hopefully get you stuck in bootloop, I say hopefully, because there's your chance: You have two options. One is to enter in factory reset and do reset with that key combo, and it should do the trick. If that fails, other goes like this: Prepare command prompt, turn on the phone and connect it PC. Between two bootloops, quickly enter following commands:
Code:
adb shell
adb reboot recovery
This will reboot you to a stock recovery (not to be confused with CWM!). From there, format data and cache and reboot the phone. It will boot up to a fully functional stock ROM. After that, you should be unrooted and everything (except bootloader, that stays unlocked). If THEN touch doesn't work, then I'm sorry to say that your digitizer is broken. Best of luck!