I need a list of potential job candidates for local market research in SS Africa

From all the social media platforms, I need a list of africa based students//graduates that would be willing to conduct on the ground market surveys in the countries of Tanzania, Kenya, Zambia, Zimbabwe, Botswana, South Africa.
By searching on social media sites like Facebook/twitter/LinkedIn/whatsapp etc.
I believe need to find the right candidates,
The output would be a database if these names, their education credentials, location, age, current job situation, size of network..