Data Bundles

I'm trying to purchase 10 gigs data as Vodacom has the promotion that doubles the data purchased. This can only be done from the My Vodacom app. When requesting to make payment via credit card (as per the option), you need to register your credentials as higher authority is required. This is where the wheels fall off as you need to register for my Vodacom App to continue. Why should I do this considering I am already signed on to My Vodacom app? At 12:03 I called the Call Centre and had to be transferred to Support. Support said I needed to use a debit card and not a credit card (why have the option of credit card if it does not work was my thought ). I was told she would call me back in 10 mins to see if I had come right using a debit card. It is now 13:35 and I am still have no call back, no data and no service. This is unacceptable and pathetic service from Vodacom.