Hire an attorney to review the case. Something is not adding up in the situation you describe.
This answer DOES NOT establish an attorney-client relationship. This answer is based on the limited information provided and is not intended to be conclusive advice. There are likely other factors that might influence or change the advice after a more lengthy consultation.
You need a family law attorney who knows how to set aside the default judgment or to file an appeal. It appears from your message more than 30 days has transpired from the date of a default order being signed by the court. Therefore, a restricted appeal should be persued if not more than six months have transpired from the date of the court signed the default order and you did not participate in the trial. If neither of these fit your set of facts then a Bill of Review is the altenative. Hope this assists in your issue.
A weekly guide with tips and legal advice for each stage of the process.