If you think, taking this case to court, assuming you have lots funds to proceed, then that's your last resort.
I don't think anybody stands a chance against a regulated exchange that for whatever reason froze people's accounts or funds. It might even be a breach of their TOS that lead to this.
I know it's difficult to have patience in current market where the price keeps going up, but there literally isn't anything that can be done than to patiently wait for Poloniex to come back to you and hopefully solve the problem.
It was like a year ago where Poloniex has said to significantly increase the capacity of their staff, but it doesn't seem to have helped much at all (if they did it in the first place).
