MTN is loading 30GB and charge me R5000 for it

For MTN<br> ***<br> Cell: ***<br> <br> About 30GB of data bundles were loaded into my phone without me applying for them. All this happened today in denominations of 5 MB-300 MB within 2 seconds. Previously you charged me over R5000 for such thing and you claimed the purchased was validated by your account department as having requested by me. Please, please and please take away your data bundles. I did not apply for them. I do not need them. <br> <br> Secondly, I need to be refunded all my money that you have taken from me for loading your bundles in my phone. This contract is a TOP UP CONTRACT. <br> <br> If I need bundles or airtime, I will buy it myself. I took a TOP UP contract because of my financial situation. This is completely unfair, unreasonable and is aimed at destabilising your loyal customer. If this cannot be reversed, please cancel this contract. It is putting me under unnecessary pressure. Please.