Unexplained Charges

I did an upgrade on an existing contract online. I was then invoiced an admin fee if R150.00 which does not apply to an online upgrade. Upon querying the overcharge with numerous consultants over a 50 minute call I was told that it would be reversed and that a service request enquiry will be logged for someone to call me. I then realised I'm also being billed for 2 handsets instead of 1 and no one could explain, why? After the long frustrating call of having been transfered between Customer Care, Upgrades, Accounts, Online Upgrades and Express Departments I am left helpless. I today received an invoice after being told that all will be sorted out with no corrections to my bill. I cannot understand how after such an effort I am left as a very dissatisfied loyal customer according to what Vodacom sales persons call me for promotions. So unhappy.