BILLED FOR A 3G DATA BUNDLE I NEVER BOUGHT

I have a MTN 350 TopUp contract with MTN. I do not use that number anymore as I am waiting for my contract to expire so that I can cancel it with MTN. In the meantime I use the monthly R350 airtime that has been credited on the account in my modem at home which only I use. I do not use it very often. At this stage my credit is R717 on my account. When I look at my debitorders for 01 July I saw that MTN deducted R782-00 where it is normally R399. I phoned MTN and was told that there was a 3G recurring bundle loaded on 10 July and the statement item is a JENGA SERVICE FEE. I want to make it clear that I NEVER requested that bundle to be loaded onto my account and there is no way that I would have requested it because I have so much credit available to use if I wanted to use the internet. I cannot afford this mistakes as I am a single mother and a deduction of R363-00 more than it should be is unacceptable for me. I also CANNOT wait for 7 working days to be credited into my bank account as I need to pay bills. I need it to be rectified immediately and credited back into my bank account. My reference number for the call to MTN: *** and I spoke to Keitumetse.