Downgrade from top up 400 to Uchoose R100

In March 2014, i missed a payment with Vodacom. I was disconnected and told to buy a simcard, pay a certain fee, etc. I did all that, i was re-instated. They insisted that i sign up for a debit order, which i did. They didn't debit the first month after that, the reason was that they had not captured the banking details i gave them instead they used a standard bank account which was unknown to me. Long story short i resorted to transferring the money for my re-instated contract to Vodacom.<br> <br> November came and I was due for an upgrade, i was told the upgrade could not be done because of something on my profile. I learnt that as a result of the March disconnection i could not upgrade unless the negative information was removed from my profile. It was removed in December. Then i got a shock of my life when i was told i could not go for Top up 400 which is the package i was on. I was told i could upgrade on Top up 100. and i could only get the entry phones with the Top up 100. Now the interesting thing is they still continue to deduct money for the Top up 400 package on a monthly basis, yet i cannot update to a similar package. How can they possibly explain this?