learn proper grammar and by a new phone
put it on charge
charge it
Buy a new one
If your phone just wont charge (but still turns on) - it's the battery at fault. If a new handset (which will also include a new battery) is not much more than the cost of a replacement battery - go for that option.
try buying a new charger
Dead battery
The charger might have something wrong with it. Or the battery is shot. Go to the shop where you got your phone and show them your charger and battery see what they say.
You can use a universal charger. Usually they should charge any battery under 4.8v.
that means you need to charge it using the mains adaptor that came with the phone. you must of used it too much so every now and then you need to charge it or it wont work..
If your Galaxy SIII will not charge completely, you may need a new battery.
The battery itself could be shot, the lead plates inside do wear out over time.
You have to turn your itouch of all the way