Since this debt has been discharged by the bankruptcy court it cannot be collected legally. The superintendent is violating the bankruptcy code as he is affecting your employment. I would hire a lawyer to write him a letter, have the lawyer copy his superiors as well. What he is doing is completely wrong, but you need to get his attention. The next step would be to sue him, but I would try a letter first. As you said what he is doing is illegal and amounts to extortion, you should get legal assistance.
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