Phal with wiliting flowers and wrinkled, floppy leaves

[Tulip Poplar]

Hi... I'm new to the Orchid Board. I have 4 phals - a collection I've started within the last year. The newest member of the collection was an impulse-buy from Mom at a local florist which doesn't really deal with orchids. Sure enough, after I put it in my envirmonement, the flowers wilted, and the leaves wrinkled and flopped down on the pot. After observing a bit, I thought it was dehydrated. I unpotted and it was mostly shriveled hollow (not rotted) roots. I soaked for 30 minutes, cut off bad roots, and repotted in spag moss, watered and fertilized. I also reduced the light becuase I thought maybe it was shocked from moving from dark environment at the florist to my birght east window. Doesn't really look better, perhaps even slightly worse. Did I do the right things?? Help!