Stupidity

My daughter was overseas for 20 months so when her contract ended I telephonically requested them to keep her number for her until she got back when she would upgrade. They told me the cheapest option to do that would be R50 per month to which I agreed. When she got back she was told that she was locked into a R50 contract for another year and could not get a new phone, which she needed. I think the person who helped me initially definitely misrepresented to me as i did not want a contract. how can they prefer R50 per month for 12 months to R300 per month for 2 years and a happy customer. In our immediate family we have more than 20 contracts with vodacom.