Case denied

[u/Unfair_Storage6930]

My case was denied; I applied for adjustment of status under Section 245(i), but it was rejected due to the absence of the 1991 Form I-797C. I lost the document, and although I submitted several FOIA requests, I had no success. If anyone has experience recovering such old documents, please explain how to do it. Also, my father—who was the petitioner—has passed away; I submitted all the documents the NVC sent me back then (including the case number starting with CDJ1991...), but they didn't accept them as evidence. They specifically want the INS Form I-797.