Why won't my iphone charge or switch on?

I recently went on vacation to New York and bought myself an iphone while i was there. It was working perfectly fine but when i got back home (South Africa) it wouldn't even turn on or charge. What could the problem be?

As Francesca said. Try a different charger
You can even try cleaning out your charging port, but given that its a new phone, I don't think there will be a lot of dust in the port.
So, the best thing to do now is to try to reset your iPhone. You can do this by holding on the home button + sleep button for about 15-20 seconds. You should see an apple logo on screen and your iPhone should restart

Try out some of the tips given here, maybe that will help http://fixyourgizmo.com/2014/08/12/fix-iphone-wont-turn-on-problem/

http://fixyourgizmo.com/2014/07/25/fix-iphone-5-wont-charge-problem/

You should buy a different charger. That worked for me. My phone was just dead.

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