Hi Tinam,
I found following post in the past forum,
Sorry to hear about this kmilo,
"The benefit of CIT 520 is that they tell you specifically what documents they want, unlike the RQ which is overwhelmingly broad (in my experience).
CIT 520 indicates that they've looked at your case in detail. This is good. Your file has been on someone's desk, rather than sitting in storage. Hopefully it is still on their desk.
If you can provide the documents they have requested, or very good alternative documents that address the similar issues, your citizenship will probably be processed relatively quickly"
Good luck.
It would be great if you create package of document to address the CO. please do not rush to send it.
Please let us know we all wanting to help you create the package. I am sure Rigly68 would be wanting to team up as well.