I was in someones bankruptcy but never notified about it. I called the court trustee. but he didnt replied well. isn't there a law about this and how or what do i do?

if you didn't get a notice of the Bankruptcy isn't prove that there is fraud. at the petition, there will be a mailing matrix with the addresses of all creditors listed in the bankruptcy. The court mails the notices to creditors at these addresses. So if the debt is old & was mailed to an old address, the post office would have returned the notice. consult with an bankruptcy attorney for more guidance.