About all that is left seems to be seeing what happens at OLCI. If you can check in to J but don't have seats then you aren't any the wiser but at least may be able to negotiate from a stronger position. If the check in only offers Y or fails then you try the phone again. Otherwise it's try to negotiate at DTW and, if that fails, at PHL where the options are fewer. It's really a royal pain and not helped by it being a holiday weekend at both ends. Good luck!