Button is worn out on my white iPhone

[iSurfHi]

I just noticed tonight my white iPhone the volume control when you push down its totally worn its flushed with the case and you have to push hard to make the volume go down. The top end of the button is nice and stands out. What should I do? my 14 days is up its actually going to be a month on the 12 of this month. Please I need help?
Thank you...

 

[CD3660]

You have a 1 year warranty so don't hesitate to use it.

Take it back and ask for a replacement iPhone.