touch screen problem

[JJJlovesSony]

i have a problem of my xperia neo l my left most screen is not working i can not type letters q, a and i cant use the upper case key i haven't drop my phone, i was just charging and after i turned it on and the left most touch screen is not already working

i really need your help guys

thanks

my father bought this in vietnam but im here from the philippines

[JJJlovesSony]

ok thankyouverymuch