Who says Africa is Independent

Why does the west think Africans should say, "yes" all the time? Why does the west determine the price when they sell to the African countries and again determine the price when they buy from developing countries?

Why do most Western countries provide free education and medical services to their people and demand that African countries, as part of loan conditionality, charge fees for education and medical services?
The ever-increasing integration of national and transitional flow of investment gives the African countries not much to say for example why do they insist on sending GM food aid to Africa when Africans don't want it?