Fiancé Visa Question, how long should we wait for notifications or appointments?

Q: I applied for a fiancé case and filled out all of the paper work and everything that is required. My fiancé had his interview on April 27, 2014 but he received a yellow paper stating that our case needed further administrative processing and that they will call my fiancé for further instructions. My fiancé did receive a call but unfortunately was unable to speak...