There could be multiple things that is causing the problems you are facing. a. Lack of sunlight. I know they can be grown indoor but there should be some bright sunlight for them to grow. Is there a too strong compost in the mix? You need not pluck the plant to check root. Just dig an inch near the crown of the plant and feel the stem. If it is woody, then it ok. if it is rotten, it will be very slimy.
The ones I will be geting are all seedlings. Orchid seeds are raised in tissue culture laboratory. I can give the seedlings if you have anyone picking it up from me.
Compost might be bit strong. I did not want the plant to starve. I will check out the stem first thing in the morning and will update you.