BILLED ON UPGRADED TOP UP CONTRACT

I upgraded in Nov 2014 and agreed on monthly instalments of R249. I made it clear that it should be the same as the previous contract, TOP UP, STRICTLY NO BILLS.<br> The first debit that went off my account on the 03 January 2015 looked OK, R244.00. On 03 February, instead of 249 they debited R548. I queried this at the branch and the lady who assisted me said it's the upgrade charges. This surprised me, as no one told me about the upgrade charges. I also asked her to check from the system the status of my contract because I had noticed that after work (where I use Wi-Fi) I could still access internet. She said everything looked fine on her side. I asked her if she was sure that the next month I wouldn't get extra charges, she said yes my deduction would be back to the expected R249.<br> On 02 March I was shocked to see a deduction of R1457. I called the MTN 808 number, I was told that the reason for over deduction is the OPEN LIMIT. Asked for my limit to be closed which they said they did. I logged the query at the branch about these extra deductions and asked them to cancel the debits.<br> While still in the process of following up my query, they debited R808 but I was expecting no debit.