I regret upgrading with Vodacom

Since oct 2015 im having drama with my contract upgrades. When I was finally about to switch over to cell c last week. The retentions dept finally 2 almost awesome deals.however the agent spelt my delivery address incorrectly hence my phones where delayed. I had to follow up through different departments to get info. Then finally I receive the incorrect phone and the other upgrade isnt on what was discussed as per agreement. Service requests are logged but no follow ups or calls back. I have to keep repeating myself to every agent then transferred go different departments. Team leaders themselves dont get back to me yet still nobody knows about my contracts. Im being billed for 2 new renewals of which I dont have the 1 phone and thd other is incorrect. How do I get compensated and my matter resolved as this is unacceptable.false and broken promises and passing the buck.