Vodacom not up to standard

My contract ended so I asked the upgrades department to reduce my package so I'd save about R400 to R500 per month. Especially since I wasn't using half the data and minutes allocated to me. I received several quotes and options from them and eventually chose a sim only option based on their quotation for R389. Now the invoice has me on another package and I'm still paying close to the previous amount I was with some unknown user charge which was never there previously. Trying to get hold of anyone in upgrades to help is a mission and customer care cannot assist. Its absolutely frustrating and disgusting that they ignore their loyal customers like this. It's been 3 weeks now since my first call.