Vodacom: ****s and *******?

I purchased a black Friday deal for a new iPhone upgrade contract. Received SMS notification that the order was accepted by Vodacom and received confirmation from the courier service that it was received and ready for delivery. Unfortunately it never arrived. Following numerous calls to their customer support centre to determine why I hadn't received anything, Vodacom blocked my number. Using an alternative number I eventually found out that Vodacom had cancelled the upgrade without first consulting me. The only advice I was given was to order the device again but they refuse to honour the price of the original agreement. Every time I spoke to someone they where extremely unhelpful, always promising to "escalate" but all they did was pass me from one department to another and back again. If I could give zero stars I would.