She needs to gather all her documents and consult a local immigration attorney to determine if something can be done. The attorney will also determine if she qualifies for a different immigration benefit.
Hard to help remotely. One would need to review the entire record and get up to speed with the facts.
The information contained in this answer is provided for informational purposes only, and should not be construed as legal advice on any subject matter,not should it be viewed as establishing an attorney client relationship of any kind.
The questions that need to be answered in this case are what are the correct dates that need to be utilized to make the CSPA calculation and when did the alien seek to acquire permanent residence under the CSPA. In order to qualify under the CSPA the child does not have to have an application for permanent residence approved when they are under 21, rather they must seek to acquire permanent residence within 1 year of the priority date becoming current. Thus, things are not always as black and white as they seem.
Your friend needs to consult with an experienced immigration attorney who can review the relevant documents and dates in order to make an appropriate determination. Just because USCIS says she is not eligible does not make it so.
While this answer is provided by a Florida Bar Certified Expert in Immigration and Nationality Law, it is for general information purposes only and an attorney/client relationship is neither intended nor created. You should seek out qualified counsel to review your case and provide you with advice specific to your situation. Review Mr. Devore's Avvo Profile for more information about his expertise in immigration law and how to contact him to discuss your case.