iPhone X volume button fail after water damage
today I tried to take some underwater shots with my iPhone X in 4 feet water everything was fine then suddenly volume up and down button stopped working then I realised and checked lci it was a bit red the phone is working fine except volume rocker volume up doesn't work and volume down is pressed continuously so whenever I try to increase volume from control centre it is lowered automatically I have put it rice container for last 4 hours and yeah 2times I saw some pink flickering on screen fo a second
please help
iPhone X, iOS 11.4