Back order?

So on Monday I app**** online for an upgrade. Was informed (as per the website) that delivery of my new device will be \next day\". It's now Wednesday and I have received nothing. Not a phone call either. I called your customer service and was told that I am on back order because there's no stock of the device I chose. Even though the confirmation email I received stated that the devices are 'In stock'. <br> <br> I'm confused because nobody seems to know why I received a confirmation email saying that there is stock but now all of a sudden there is no stock. If the matter is not resolved I will cancel the order along with the contract. Which by the way I received an sms saying will be extended to 2018. If I do not receive my new device by this week you leave me no choice but to cancel all dealings with vodacom. This is the last straw with you people."