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Sorry to hear this but you would need to either return your device to the place of purchase or contact Xperia care http://www.sonymobile.com/global-en/support/contact-us/
Shame you aren't in the UK as our stores provide albeit a cheap phone to use untill yours is fixed
If you bought the phone here in the USA, you were most likely offered a damage protection plan, Sony will repair the phone even if you dropped it.