Hello and good evening.
I am sorry to hear that your camera is not working.
Since it is brand new, it may still be under warranty. As such, you should be able to take it back to the store you bought it from for them to repair it or replace it with another one.
Other than that, you can contact Sony Product Repair Division at 1-***-***-**** if the warranty is still valid. In the event that the warranty is no longer valid, call 1-***-***-****. You can also visit one of their certified service centers at http://repair-camera.com.