Some touchs not responding on keyboard. Unable to swap to answer calls

My Samsung galaxy S4 got wet after a night on window seal. The phone turned of the following morning when I plugged it to charge. I try everything everyday and after a month, I was able to turn it on, have everything displayed, but few major problems.

-I can make calls, but some touches on dial screen won't work.

- I cannot answer calls because the swap button to answer won't work.

- I can't login to my google account because some keys are unresponsive on keyboards.