I sold shares of GVRP through Ameritrade

[Emptyhead]

Updated:Include me in this mess. I sold Monday afternoon 300 mil/shrs after spending three phone calls and much time on the phone with Ameritrade during the morning hours having been convince by them it would be fine. My original buy in on the stock was for 1500 shares last Wednesday and Thursday. Friday I did not sell a single share.
Today I received a call from them that I could be potentially Short the stock if the shares do not show up on Wednesday/Thursday. I asked them then,today,if I could buy the shares back at the price I sold,.0001,and they told me I could not. They would no longer allow a market with GVRP shares for Ameritrade clients. This is nightmare! How they can do this and allow the trades to take place in the first place is beyond my comprehension. If I can not trust what I buy through Ameritrade how can anyone else?