I don't know what else you can do except spend time kvetching and explaining your position. It does look bad for the school for you to graduate and have no job afterward. This is also pretty damn late for them to be announcing "GET OUT". Again, see if you can find someone to appeal to. Hell, see if they have a program that lets you start working on a Master's, take the semester, get some credits for if you ever decide to do a Master's, and then walk with the rest of the graduates in May.
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*Casts Doom on everything* You all must now feel the pain that I have felt...DIE!