Contract Upgrade

On the 27th April 2015 , I visited the Hemmingways branch of Vodacom to enquire on an upgrade on my contract. I was met by a very friendly gentleman who promptly assisted us. I chose a Samsung A3(Gold Colour) and he informed me that it would be delivered within 4 days. This is the 10th day already and I received no information from Vodacom about the phone. When I enquired telephonically about this with them, a young lady was very rude in her response , telling me it is on back order and I must just wait for an sms from them. I think it is just courteous to inform a customer of any delays or problems as I am now expected to pay the new premium at the end of this month but yet I am not using this new benefits.