I don't think there's any survey site that pays Africans, because their surveys are not for us, mostly if you realise most surveys are questions about a certain experience or a review on certain products and most of these things we are doing survey from are not available in our country hence our survey answers are completely useless that's why we cat get surveys I'm explaining so that you can understand from their own point of view.
The only survey site I once partake in is Prolific, and I didn't get paid, I was told I have to buy US phone number and use VPN, I then abort mission.