All Sound Wont Turn Off

This is my favorite game to play on my phone, but even when I turn off all sounds and music, there is a rain noise in the background. I like to play this game while I listen to music, but even when there is no rain during gameplay, the rain sound is still there. Please, please fix this!

devinbuggs about Street-food Tycoon Chef Fever: World Cook-ing Star, v1.5