pre order no delivery

On the 18th of November I pre ordered a iPhone X 265 gig silver from Vodacom. On Wednesday the 22nde the business department sales personnel called me regarding my upgrade and pre order. And stated that the iPhone X would be delivered on Monday the 27th of November. They processed the upgrade and conformation were sent via sms. With a Ram tracking number. Now its Wednesday the 29th and still no delivery. I called ********** with my reference number and now the kind lady tells me its on back order. But why do you then process my upgrade and give me a dilivery date if nothing is going to be dilivered. Then i could have gone to a Vodashop and upgraded in store. Or move to MTN as they could have assited me with a iPhone on Friday. And now i cant becuase the upgrade is already processed.

This is unasaptable to me as im a Vodacom VIP RED + business client.