BTW, Phals should not be watered with ice cubes. They like warm roots. I think the reasoning behind the ice cubes is to regulate the amount of water so that people don't over water them and don't let water sit in the crown. However, chances are the plant should have been repotted, as it was likely tightly packed in sphagnum moss, which rarely works out well in the home (though is a preferred method in green houses) as it can become soaked and won't dry out fast enough. I would expect improvement to take weeks, not days. If it stays green, I wouldn't give up on it. Keep it warm, good humidity, don't let it sit wet and it may well still put out roots. I wouldn't be too concerned if the stem is dying off, just gently twist the keiki off the stem and offer it the right conditions and see what it does. Be patient. It may start a new leaf before it starts roots. It may lose one or two of the leaves it has and still might come around. It may take months, but what a great reward! It may also just die off, I hope not!