samsung tab sm-t113 need firmware,,,

good day to all,i have tab sm-t113…before the problem is always appear in screen "anfortunately error"then i try software with latest version 4.4.4 ..flashing done but the problem is the notification or the shortcut when u slide the screen down to go on setting is not working,,,i want to try downgrade the firmware..pls give me old version or link,,tnx a lot.