Nothing wrong with Ursula's suggestion. I think the potting media is not "chunky" enough, and since you are using a bit larger pot than necessary, that additional fine/medium mix may be too water-retentive. I don't throw away orchids until they are truly kaput. If this were mine, I would keep it in a warm, bright spot and mist the leaves/roots every morning. I would not drench that media until I saw evidence of new growth (roots and/or leaves).
