Vodacom lack of info cost me money

My mother upgraded her contract after Vodacom harassed her continuously to do so. When in the Vodacom shop in Sasolburg to upgrade the consultant did not tell her of the R416 because she upgrades early. The information on the R416 was only on a document on a tablet given to her to sign. The tablet was handed to her to sign with n explanation on what the content of the document. I feel very unhappy with the lack of information and the financial consequences of the lack of information given.