Bad Vodacom Customer Service on Uprade and more

I am beyond frustration with Vodacom. I have been trying to sort out an upgrade on my contract since April! I have spoken to the upgrade department, retention department and cancellations department and no one is capable or able to assist – not even the so called escalations managers in these departments. They don't do what I request and worst still, they stuff my different contacts/numbers up! Every time I phone they promise that everytihing is sorted, but alas..problems still not solved, or even worse now!

*&^%$#@!!!