MTN exploiting clients with enormous data bills

I have a contract with MTN for my 15 year old son which is a TOP UP contract. He is supposed to ONLY recieve his 200 megs of data and 50 minutes monthly thereafter he is supposed to use his own money to buy airtime, data etc. I thought this is a good way to manage his data usage. To my great surprise I receive a bill of R9302.14 from MTN when my monthly bill is usually under R500 because of choosing the TOP UP contract. Is that contract just a farce that MTN uses to deceive clients into believing they managing their contracts. <br> My son apparently found some loophole on his phone where he was allowed to increase his data up to R9000 some odd. He thought its like these online games he plays and wont be charged.<br> Now MTN wants me to pay R3100 monthly? I am part of the lower income group in South Africa with 3 children, one being a baby so where on earth would I get that kind of money? <br> MTN was NEGLIGENT and are now increasing profits through exploiting their clients!<br> I have a Vodacom TOP up contract and there is NO WAY of me getting data on \credit"like MTN.<br> Do not be fooled into taking out a MTN contract especially if its for your kids!"""