Unhappy The s pen features stopped working

I made this account to adrress the issue here, as ive not seen someone realy give an answer before apart from 'restart your device' or 'turn air command on'
The story s short: one day it worked, the other day i updated the tab to 4.2 and then it stopped working... i went back to 4.1 and it still didnt work, so now im stuck without being able to open the menu, nor can i use the button related features.
Ive tested my s pen on other note, and it works perfectly too, so im sure it has to do with my device.
Any help, ideas or well... anything???
Thanks in advance