Vodacom Is pathetic

My uncle purchased a Vodacom smart tab 3g for me on contract in November 2014and on the box I was told I will receive 100mg per month for 3 months for free and we are now in May2015. We have called to ask about this and was told I would receive them. I never did. We went to see them and still nothing has happend. I don't mean to sound pettyful but, I really looked forward to those Mg as I only get 500mg a month. But honestly. Vodacom sucks I will never take another contract with them ever again. I am truly disgusted. And believe that this is a ****. I hate Vodacom