absorbident data charges

I have been using mtn for the pass eleven months i have a top up contract and from day one your data charges have been incorrect mtn advertise that charges are 99c per mb which is utter nonsense as when i purchases data bundles i get overcharged on my phone when i hardly use the internet its even worse now that mtn has increased a 1gb data bundle to R105 and at the same time mtn takes away your data for no reason and i am not just saying this or making up stories i have seen other peoples complaints on this site i will definitely stop using mtn very soon as it seems like mtn robs loyal customers.