Order being cancelled by Vodacom because they cannot find my address

I renewed my contract a week ago. I was told that the device I have requested was in stock, and that they would sent my order straight away. Yesterday, 03-12-2018, I phoned them because my order was still not delivered.

I was told that the order was returned to warehouse because the courier company didn't know where my address was, so my order was cancelled and returned. I was never informed by anyone that there was an issue with my order, neither did anyone try to contact me about this issue. I also never received a tracking number or any update from Vodacom or the Courier

Now according to Vodacom my order is cancelled and someone will phone to complete the cancellation, which no one has done yet.

This is extremely poor service. They treat their clients like little children. I want to cancel my contract so that I can move to another operator where I will be appreciated