Lady slipper is not doing well

[Parkep]

I bought this plant about 2 weeks ago. I don't have any previous experience with lady slippers. I have 5 Phalaenopsis, and they are doing well. When I bought this plant, I didn't know it wasn't healthy until my mom informed me that the leaves were too light green. I paid a pretty penny for this plant, but more than that I really don't want it to die. It is in a south facing window, I'm on the ground floor. Can anyone tell me what type of lady slipper these are? Any tips would be much appreciated.

(I'm on my phone I can only download one picture per post sorry)