UPGRADE DECLINED ON DAY OF DELIVERY

Here's My Story of how VODACOM treats their loyal clients! My wife and I went into a vodacom store to do a premature upgrade. The store at Clearwater advised that we couldnt upgrade as yet and asked that we call in to the call centre to see if they could assist. On Monday the 14 March 2016 My wife called in to do the upgrade and the agent who assisted us confirmed that the device will be delivered to us within 2-3 working days. Today is the 3rd working day and when My wife called in they advised her that the contract has been declined. I want to know if this is how business is done at VODACOM. I tried calling the upgrades department to speak to a manager of which the consultant Patricia KHumalo says that there are no MANAGERS available to take my call. Can somebody with authority please be so kind to give me a call and explain how the whole process works. Because right now I fail to see as to how something could first be approved and then declined when its time to deliver? If I dont get an answer from somebody today! I will take this matter further as it is ********* business practice!