I appreciate this info,
@TeMoeg ... please keep us updated even if you feel a bit worn down by Telkom.

By the way, what do you mean by Vox being slightly more expensive than Telkom?
If you sign up for a 4Mbps Pure xDSL / Naked xDSL service, there is a R1647 price difference over two years, in addition to the cost (as well as delivery cost) of a router.
My calcs:
Save R819 total in the first six months. ( 6 x [R375 - R199] )
Then save R46 per month thereafter. (R375 - R329)
That's a saving of R1647 total over two years, plus you get a free router in addition to that.
There are similar savings available on the other Telkom xDSL packages (10Mbps, 20Mbps, 40Mbps) currently on offer.
Telkom has the upper hand on offerings involving their own legacy infrastructure, unfortunately...