Vodacom sales dishonesty logjam

An agent phones me to UPgrade my data package and I end up with a package with half the data for the same money. Now I am told there is nothing they can do about it as the router is out of the 14 day return period. Who in their right mind would UPgrade to DOWNgrade? Nobody! Trying to deal with Vodacom is impossible as each entity defers to another and the external sales folks just refer me back to Vodacom Direct for which there is no selection option on the 082 135 menu.