Dear Sir or Madam,
Do you have any damages? Has the stock started trading? Is it trading higher than the buy in price? Generally, for a breach of contract case, one has to "mitigate your damages." What that means is that you may have to purchase the stock after a reasonable period of time and sue based on the difference in price of where you could have bought in and where you did buy in. There is a lot of information that has not been provided.