Poor service levels and ill-informed customer services: Vodacom

Can Vodacom please clarify (even if it's only a baseline) exactly what level of service (in terms of upload/download speeds) I can expect with an LTE sim ? At my brother's place in Buccleugh the data rates are something like 30 Mbps over a Vodacom link. Here in Witpoortjie it's more like 2 or 3 Mbps with frequent stoppages. We're paying the same money - we need an explanation for this disparity. When I spoke to Vodacom customer service, they started asking about my PC and was there a problem with it ? I explained that data bottlenecks occur at one's Internet router since thereafter it is (relatively) high speed wi-fi or cable ethernet to PC. They don't even seem to understand those type of basics or alternatively are being deliberately disingenuous trying to obfuscate the fact that they are failing to provide the service being paid for.