There are several poems with this title, but the most famous one is by Pablo Neruda, a Chilean poet.
While the poem does deal with themes of poverty and exploitation, it is not representative of African poetry. It would be more accurate to describe it as Latin American poetry.
Perhaps you're thinking of another poem with a similar theme that is indeed African? If you could provide more context or details about the poem you're thinking of, I might be able to help you identify it.