Unless you swamped the bid with your order, I would have gotten in touch with the SEC immediately. Unless the bid was swamped with selling, your broker screwed you and should have made it good or gone to jail. Since the market became computerized, there is a record of every trade and the conditions at the time of execution.
I made the same mistake not too long ago. Trading while at work, the PPS went high and I wanted to eject before the down turn, I placed the wrong sell type, and lost 2k.
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