I don't want to pick on you, but you insist that you have proof that you qualified for the CCA. Unfortunately it is not up to you to decide this. Please read the following information very carefully as I think it directly pertains to your case. I don't know if something has changed about this interpretation:
My understanding is that you are still outside of the US, that's why I am asking if you are still under 18. Otherwise if you are older than 18 and come back I don't think you can benefit from CCA. For now I would focus on trying to come back to the US as a permanent resident and see if they let you in under that status and that your GC is not canceled for abandonment. I wish you would have posted this question much earlier.
http://www.immigrationlinks.com/news/news999.htm
"What Is Meant by the Phrase ``Residing in the United States Pursuant to
a Lawful Admission for Permanent Residence''?
To qualify under the CCA, applicants must establish not only that
they have been admitted to the United States as lawful permanent
residents, but also that they are ``residing in'' the United States
pursuant to admission in such status. Admission in any immigrant
classification will satisfy the requirement that the applicant be
admitted to the United States as a lawful permanent resident. A more
difficult question is raised by the requirement that the applicant be
``residing in'' the United States. Under the section 101(a)(33) of the
Act, ``residence'' is defined as ``the place of general abode; the
place of general abode of a person means his principal, actual dwelling
place in fact, without regard to intent.'' On the other hand, in
certain circumstances, an alien with lawful permanent resident status
may live outside the United States without losing that status, and for
some purposes U.S. citizens living outside the United States are
considered to still have a residence in the United States.
The Service, in conjunction with the Department of State, is
reviewing the legal question of whether, and if so, under what
circumstances, a child with lawful permanent resident status who is
actually living outside the United States can be described as
``residing in'' the United States for purposes of the CCA. Until this
question is resolved, the Service and Department of State will only
document as a United States citizen a child in two instances. First,
the child will qualify if, on or after February 27, 2001, the child is
admitted as a lawful permanent resident and
actually living in the
United States. Second, in the case of a child who was previously
admitted as a lawful permanent resident but was absent from the United
States on February 27, 2001, the child will qualify only if that child
returned to the United States after February 27, 2001 and was re-
admitted as a lawful permanent resident. The child must also be in the
legal and physical custody of the U.S. citizen parent. The Service and
Department of State, in the interim, will regard that child as residing
in the United States."