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Well your only option is to file a suit but I really believe that either the funds will be released very soon. It is possible they will issue you a check from the bank and close the account but I can't speak for the bank. If you file a suit you will be able to obtain discovery and find out exactly what is happening but from a practical standpoint it will take you a long time to get any of this resolved in court and it will be expensive.
You may also be able to file for an injunction against the bank for wrongfully withholding your money. You will probably need to hire an attorney for all of this.