Not receiving the promised device on contract advertised

I do not understand how Vodacom advertises and offers deals when they can not fulfil the stock commitment. I took out a contract 3 weeks ago and was given a handset, the smar****ch I was told however they do not keep stock in store, they must order, the lady checked and said there is stock and it will be delivered on Tuesday (I took out the contract on Friday prior). 3 weeks have passed only to be told over an over Vodacom does not have stock. TNo idea when they will even get stock. I find it very hard to believe that a large organisation can not give visibility of stock and does not have stock when promotions are run in stores. I don't know where the issue is but I am a consumer stuck between Vodacom and a Vodacom Store with no resolution in site! #Vodacom