MTN displays a corporate identity of predating on their witless subscribers. Like making them phone a special number of they want to opt out of becoming unwilling subscribers to a contractual acceptance for a service access that ensues should there be no record of having dialed the number. Predatory, illegal, immoral, sure - thats what MTN has always stood for.
They spam their witless subscribers and ensure that there is no way to opt out of their incessant nefarious schemes deigned to rob the most vulnerable in our overly vulnerable failure of a Nation. Both having no moral fiber in their core due to no related core. No rule of law due to oversubscribed abuse of the weakness of law known as greed from within. When the law is not respected and only greed motivates all - what describes this lamentable state?
If in doubt try MTN
So you don't want data, but your SP wants to access your everything and sell it on without asking or telling. Easy - you all get limited free data until we make out if your worth milking. If you not worth future revenue then we take your acceptance of free data as agreement to be charged without further ado.
Are we scumbags? You cannot call a criminal organisation a scumbag because this would be offensive and there are laws that protect scumbags from their victims you know. Ask any scumbag legal 'professional'.
Bottom line is that scumbag market participants like scumbag corporate shares, so the 'professional' view is buy the rubbish.