More information requird when buying bundles!

I went to buy a bundle when it said I could get 1.25 gigabytes on internet starter bundle for R50.00. I bought the bundle but when i checked to see if it worked, it told me that it is 100megabytes per month for 12 months, nowhere when i bought the bundle did it tell me this, meaning that i wasted my money because I needed the amount I paid for, at that moment.This not being said when you buy the bundle, means that I have wasted my money.