I forgot to add that it is my impression that some reliable visa companies in D.C. have built up a relationship with the D.C embassies over the years and may well be able to more quickly and easily solve a problem like yours than could an individual filing his own application with an embassy or consulate. Maybe its worthwhile to call one or two when dealing with a difficult country, like many in Africa. I'll leave it to others to recommend a reliable visa service.