When a nation rejects God's way, tragedy follows. Your nation may be suffering the effects of grave national sins, but Jesus Christ offers a way of escape for you personally, if you will strive to obey Him!
A "famine" of hearing the truth occurs when the nations of Israel are taken over by a foreign power that prohibits the proclamation and practice of the true biblical faith. This happened around 720bc when Assyrians carried the northern 10 tribes of Israel into captivity. It will happen again during the Tribulation, when the modern descendants of ancient Israel are punished for their sins (Matthew 24:9; Hosea 5:5; Jeremiah 22:5–9).
Satan is also called "the prince of the power of the air, the spirit who now works in the sons of disobedience" (Ephesians 2:2). For Satan and his demons "work." They never grow tired. They never quit.
God has a plan for all mankind, and every nation found in earth's history is subject to His guidance and direction. The nations of Africa are no exception, despite its troubles and trials.