MTN prepaid is like hell on earth

Pls hear my complaint here. On my mtn profile I've had data only bundle prepaid options on made4me 100/100 GB data for R299 and 100/100GB data on my Town for R350 throughout February. Before I went to sleep late at night yesterday these options existed so I woke up today & bought airtime but when I reached on the mtn app both these options are gone and all that's left are ****py options that only make sense to mtn as the type of ******* a person from my area should be buying. Why are networks allowed to use and abuse us like this. If they were forthcoming with what they were selling I wouldn't have bought this large airtime anyway but I feel like they use trickery to get customers to buy the airtime and then remove all the options that attracted the user in the first place. Why is this allowed, why are these networks given a greenlight to do to us as they please. Can mtn refund my airtime at least because I've already to decided to take the hard road instead and go through the month without internet connection thanks to mtn. If I intended to buy a 100/100GB data bundle and that wasn't even enough, but I could at least adjust my expectations to the size of my bundle and cover the month so than what am I supposed to do with 5/5GB with some voice bundles, what kind of ******* has mtn been told about our data needs in the townships. This is a clear trickery, and shouldn't be allowed by icasa in the first place and mtn also shouldn't be treating its paying customers like *******. On prepaid you already have to accept paying way more than on contract options but then this trickery conduct is the one that's unbearable. What they always come out saying on these bundles is that they are on a 'rotational basis' they are not permanent & are different for every user, but even then I didn't forsee to be ******* like this esp since its month end and most people would be recharging their prepaid accounts anyway so why remove these options now!!!?