Out if bundle billing

Was informed that my limit service was cancelled due to inaccurate service. I then asked to be moved over to a top up on my data contract. This was middle April. Was invoiced R6000 fir out if bundle usage, but I was never informed that I would be paying iut of bundle rates until the migration was completed. I am fed up with AUTOPAGE not willing to give me the telephone recording. Im not disputing the usage. I am however disputing the fact that I was not made aware of the fact that I will be paying out if bundle rates. Please help or let me know if you are not willing to help, so that this matter can be taken up with my legal team.