AP is not under the same timelines as regular interviews. You are in extended AP.
If you feel you have a cut and dry case and no wahala you should file a WOM (Writ of Mandamus) cost about $4000. Or you can wait out the process. What was the AP about what documents were they needing to investigate.? Were you married before in Nigeria? How long was your Interview? what was asked for after interview? Has your wife contacted her Senator, Congressmen? What have ya'll done on your help to get a response? Contacting Lagos does nothing they do not take emails unless they sent you one.
