volume down button don not work

[tarokh]

i wash the phone with water while all ports cover were close after 5 min the power button and volume down buttons didn not work 
after 10 min the power key work but still the volume key don not work
the white marks under the ports cover and sim card cover are still white and did not become red

[Thommo]

You need to either return your device to the place of purchase or contact Xperia care http://www.sonymobile.com/global-en/support/contact-us/