Unwanted International bundles

The roaming packages are really very useful and easy to use But the automatic purchase of a package is very frustrating. Please give us the option to buy another package. I used it now for my travels in Saudi Arabia but on my way back it automatically billed me for another package of R99 for 1Gb data -I'm not sure where as I received a message when we flew of Tanzania and Zimbabwe. This is very frustrating - I was flying over the country, I didn't land and my Mobile Roaming was off, so how could it purchase another package. Even in Saudi it automatically purchased a package, I was hoping I could run on the data that I had. Can you look into this opt out option and rather make it a confirmed purchase? Can you check why is the system sending SMS that a bundle has been purchased when I am just flying over a country. Thank you