Vodacom short selling data *****

Vodacom is short selling their data ( when you buy 1Gb you actually get 1Gb - 40% ). This hass happened to me a multiple times, the call center agents are useless and full of excuses. But just because their a big company they get away with things like that. No wonder everyone is complaining that vodacom data runs out fast, the reason is their short selling modus operandi.