You don't need to believe me, why don't you just ask Lars if they're currently selling data at a profit.Where are you getting your facts from? How do you calculate that Cell C is selling below cost? This isn't a branch of Checkers selling discounted bread - the cost / pricing models aren't the same.
Just because prices are astronomical in the rest of the market that doesn't mean they have any correlation to the cost. If I'm wrong I'd be very interested to see your numbers, but quite frankly , I don't think they exist.
He does not need to state what their input costs are, just a simple yes or no on the question:
"Is 5c/MB below cost?"
Or you could could ask it as follows:
"If you can sell data at 5c/MB profitably, why are your normal bundles priced as high as 50c/MB?"