Touch screen doesn't work .

Hello,


sir when i dial *#*#7262626#*#* on my mobile and i test various test on my Samsung android gt s5670 (fit) phone and i click on screen touch update but the update fail and now my touch screen doesn't work now
please help i try update my firm ware so many time but the phone starts bit touch doesn't work what i do ???
help me how to add touch warts on my mobile