Dissapionted. Upgarde cost higher that old price, after being told I would be paying less.

I received a call from Elite Mobile, as a contracted service provider from Vodacom. They explained to me that I am getting a new rate on my plan and will be paying less. Today I looked at my invoice to date and noticed my account is R400 more than what I used to pay. I called Vodacom this morning to request a cancellation of this apparent upgrade. The Vodacom consultant said that the Bacok Office Admin will get back to me in 3-7 working days, and I should receive a reference number within the next few minutes. I did not receive the sms, and I have no idea what the progress is on this cancellation request. I would like this "'upgrade" canceled. Any assistance would be appreciated. I am not sure what the status of my request is.