They've already breached the contract. No amount of talking is going to get you your money.
And if the company is in bankruptcy, chances are that you won't ever see your money.
But the first thing you need to do is figure out whether the company is in bankruptcy or not. You can probably find that out on the bankruptcy court website.
If the company is not in bankruptcy, you'll need to file a lawsuit.
Consult a lawyer to find out what he charges and what your chances are.