Bad service as usual from vodacom. Cancelling my two contracts.

I have been a Vodacom contract customer for 3 years with 2 contracts. I do not get a salary, but work contract work, so sometimes my account is paid late but paid. My upgrade was due April last year already, but I have been waiting for a spesific phone. Yesterday, (Saturday19 May 2018) I found a Vodacom shop that had stock. The lady was helpful, and I received a message almost immediately from Vodacom to say that it had been approved. However, the lady informed me that I do not qualify for the upgrade, but that she would put in a request to "uplift" the contract. She promised to get back to me. Sunday morning I phoned, and she promised to phone me back within minutes. At Lunch, I phoned and left details, because she was out of the building. Late afternoon, I got hold of her only for her to tell me it was approved for something else, and that I needed to buy the device cash. Why would I need a contract then? I will simply go over to prepaid and cancel my two contracts....