Vodacom delivering terrible service and not delivering on promises.

Hugely frustrated with Vodacom. They called me in March to discuss an upgrade of my account and to convince me to upgrade. They did this whilst knowing that they do not have the relevant phone available and that the upgrade with increased data will only kick in once the phone is delivered (something that was not communicated to me). They also promised to send me name change forms - something which also did not happen. Why did they not wait until they could deliver on their promise???????