My iphone will not turn on and nothing is working

I have the iphone 3gs i have had it since the start of last year and it died today i tired to charge it using the standard iphone charger and it didn't work so i though it was the charger so i got home and tried to reboot it and that didn't even work i have had it plugged into every charger point i have even had it on a iphone radio port and that didn't work. I plugged it into my computer and itunes has not picked it up and the little red battery blot symbol thing isn't even coming up what can i do?

Hold the Home button and Power button for about three to five seconds and it should come back on. If not, take it to an Apple store or use another phone to call support.

My iPad did the same thing. I called and customer service told me to hold the Home Button and the Button at the top together for about 20 seconds. Bye.

Take it to the apple store and they will help you.