most people in African countries have and dont even know how to use touchscreen smartphones...

this is wrong, not most people, is a small group of people, the problem that has in Africa is the broadband internet is not accessible to many people because the price is very expensive, people have their internet on cell phones, which is why most Africans enter facebook, whatsapp and instagram and other social networks.
In Africa, most entrepreneurs do not have access to formal banks and venture capital in the first place...
the banks demand guarantees, if you do not go to pawn something the bank will not give you loan