I upgraded my data package to the deal that was offered to me at R399 per month

I upgraded my data package to the deal that was offered to me at R399 per month. However when the paperwork was sent to me the amount showed R464.01. I have phoned numerous times regarding this error. First call was made on 3 April 2025. To date no one has contacted me and the paperwork is still showing the wrong amount. Today is the end of the month and still nothing has changed. I am furious about the lack of communication and being a customer for a long period to have to go through this for Vodacom to fix their error. I WILL also be contacting Consumer Rights regarding this issue