Contesting life insurance benifcary

My father recently passed i was informed that I was beneficiary on one policy. The other policy he had the beneficiary as my mother who is actually his ex wife. His current wife contested the policy, sent in a divorce decree and the life insurance company told he that she was denied. She is now contesting again and the life insurance company told her that there is nothing they can do because all they have record of is his ex wife's name as the bene. Along with the divorce decree she sent in copies of form that my father filled out splitting up the life insurance in different percentages between herself and all of us kids but he did the forms wrong the percentages were not right. She told me that if she is to get the money then none of us kids are getting anything! Is there ANYTHING SHE CAN SUBMIT to over turn the life insurance company's denied decision?