You should retain a competent immigration attorney immediately who can review your case and represent you. This is not something to do on your own.
This is not to be regarded as legal advice which can only be properly offered after a careful assessment of your case. Please consult with an experienced immigration attorney.
Hurry and retain a competent immigration attorney to advise you and hopefully help you with the appeal. This is a serious allegation and you shouldn't ignore it, but it's not something to handle on your own.
[This answer is for general purposes only; it does not constitute advice and does not establish an attorney-client relationship.]
You are WAY overdue for consulting with an experienced immigration attorney.
NYC EXPERIENCED IMMIGRATION ATTORNEYS www.myattorneyusa.com; email: firstname.lastname@example.org; Phone: (866) 456-8654; Fax: 212-964-0440; Cell: 212-202-0325. The information contained in this answer is provided for informational purposes only, and should not be construed as legal advice on any subject matter.