Vodabucks an absolute ****

On this beautiful Mother's day, had R190 vodabucks to spend. I purchased a Nando meal, to think I don't have to cook . I had to pay an additional R38 to complete the order. Haha, I only received 2 x R30 Nando vouchers and nobody has record of my actual purchase. Can someone explain to me how this worked? You can't get a proper meal for R30. I mean R98? What the heck happened to my R38 you took off my bank account? I feel this is absolutely disgusted and would like Vodacom to contact me in this regard. Thank you