Wrong migration plan

Two months ago I called an agent to get a lower monthly payment for my contract. At the time I was paying around 1098-R1200 I requested if there was a way for me to be paying less than R1000. She explained and gave me a quotation of more or less R600-R800 from what I recall. She said I would have to pay migration fee first and there after the R600 would come into effect. I paid the migration fee of about R950 in October. My November invoice is out and I’m expecting to see something less than R1000 to my dismay it was R1100+/-. I called customer service and asked what was wrong the agent explained that I have been migrated the package is just R100 less. R950 TO MIGRATE TO A PACKAGE THATS JUST R100 less doesn't make sense. I asked for recording from the conversation that happened in September be pulled and listened to . I got the feedback and they tell me that on the call the price that the consultant gave me was excluding my device and insurance amount. I clearly stated that what I’m looking for is for a monthly instalment less than a certain amount and the consultant goes and tells me a price that doesn’t include certain things . I definitely was not going to agree if she had clearly stated that the price she is going to mention is solely the price of the package and NOT the monthly installment . I would like them to migrate me to an appropriate plan like I had asked for to begin with . I don’t work with Vodacom so I trust the agents to advice me and help me to the best of their ability of which did not happen. ****!