Hi kgburt! Welcome to OB! I'm sorry you are having such a time with your orchid. I'm totally baffled that they put an orchid amid other plants.
Is the orchid in potting soil?
That will kill it right there. It needs good sunlight, but not too strong. It also needs to breathe and be in it's own type medium. Yellow leaves can mean too much or too little water, however it could mean other things as well.
If it were me, I would get it out of whatever it's in now, check the roots and see what you've got (black and mushy roots are not good), and get it into orchid medium and if possible, put it in a clear orchid pot so you can keep an eye on the roots.