Scholarships often depend on the level of degree program you are applying for. For undergraduates, there are many options if you are willing be flexible about your degree and locale. York University in Canada, for example, offers up to 100,000$CAD over four years if you maintain a high academic standard and are a citizen of any African country. For opportunities in the US, look at institutions with outstanding histories of providing funding for foreign students. Such programs pride themselves on the diversity they help bring to their campuses through grants and scholarships. Brandeis University is a great example. Also, Wellesley and Barnard Colleges have long histories of funding minority students.
For those embarking on a career in business and seeking the "London experience," the London Business school offers a £10,000 scholarship reward for qualified applicants who are "African nationals" and who reside in Africa. The funding is provided through the Allan and Nesta Ferguson Charitable Trust. The overall award covers about one quarter of the yearly tuition to the institution. The foundation also offers a scholarship for both West and East African students to attend the University of Birmingham. The awards are reserved for those students attempting graduate degrees, and the amount is similar to that offered through the London Business School.
Through its "Reach Oxford" program, Oxford University in the UK offers scholarships to nationals from a host of different countries where it may be difficult to find the educational resources they need and deserve. Practically every West African country is represented. Scholarships are good for undergraduate degrees with the notable exception of medicine. The funds are reserved for the highest caliber students, but social circumstances and financial abilities also factor highly into the decision-making process.
A scholarship is avaiable at the American University in Cairo for a program covers two years and the corresponding summers. It includes basic tuition as well as health insurance, costs for graduation and other fees, plus housing and monthly stipends. The program is available to those who are seeking post-bachelor degrees and have at least a 3.2 cumulative GPA. Good scores on the GRE exam are also required for those entering or wishing to enter the programs in Journalism/Mass Communications or International Development Curricula.
While many of the above-listed programs are described as being specific to Africans, many of your potential programs will not be so listed. They will be designed around multinational students or students from developing countries, which of course would include West Africa. Investigate all of them to find encouraging leads. Look throughout the European, Australian, and American universities for differently nuanced choices. You may find niches that include your nation of origin or individual circumstances even if the language of the program does not explicitly say so.