Vodacom
Een charged more then suppose to

Renewed contract, was meant to get 3 months free (AS ADVERTISED), was meant to get charged for top up 99 (NOT TOP UP 135), only meant to have change of account from May, Not meant to be charged for BIS?
Have been into a vodacom shop, they cant help apparently. Had to call vodacom accounts, did so and was told all the answers would be sent over email, still nothing...