I think the term “media” as used and understood by most people has more to do with content than with the means of disseminating said content.
“Mass media,” therefore, would be that content created by a few and copied to the many — a large circulation newspaper, for example, or a network television or radio program.
The internet’s content is anything but “mass” in that regard — there is mass media content on it, to be sure, but there is also a panoply of content created by many for dissemination to many — or the few who are attracted by the content created by a certain few, or a certain individual. The reasons why there is not an internet infrastructure like in other regions is because in Africa people have low levels of computer literacy, there is poor infrastructures in power supply and urbanism in general, and Internet services are offered only at a high cost. Hope this helps!