What happened to the best cellular network in the world?

I've really had it with Vodacom, and it's very poor network coverage, I got their router thinking that it'd do a better job but if I'm browsing the net things take forever to load and when they finally do they take a huuuuge chunk on your data. Talk about a very bad browsing experience. It took me ages to be even able to write this review, now I am trying to catch up on my Netflix series but I can't because it can't load and when it finally did the picture quality was sooo poor because of this whack network coverage!!