Misleading Information from Consultant

I am not happy with the service I have received from a Vodacom Consultant, she called me to give me an upgrade and I had requested that she cancel all my other contract lines during our telephone discussion, she advised that I can cancel all my other lines except for the two new contracts that I had taken and those will be due for cancellation in 2025 later in the year, then my new premium will be R1,700 from November 2024. I was happy with that and I opted to take an upgrade, then later after looking at my budget I realised that it was not a good move, then I called Vodacom to cancel that upgrade of which my amended premium without the upgrade will now be R1,121 because the new phone & watch would have been R579. Then when the November Statement came in, I was shocked that my instalment was R2,700 and when I called in they advised that it will be amended because they had to update their system that I had returned the phone & watch and they will refund me, till today nothing has been changed and I cannot afford to mess up my credit score, I am still paying whilst I am not happy at all with Vodacom.