Order Cancelled Without my Consent or Informing me

I made an order for space grey iPhone 6plus on Vodacom online. Everything was great, I got a call to confirm all my details, then I requested that delivery be setup for today (Tuesday the 12th of December) because I was away working in a different province, and would only be back this week.

This morning after hearing nothing from Vodacom or the courier service, I called the Vodacom after sales department and was told that my order has been cancelled.

I have no idea why my order was cancelled. I never gave consent and Vodacom did not call or email me to inform me that the order was cancelled.

This is horrible service and I am extremely disappointed.