No delivery/No feedback

On 2nd April 2015 I received a marketing call from Vodacom sales regarding a special on a tablet deal. I accepted the deal and was advised 3-5 working day delivery but would phone and confirm. 16th April 2015 I had to call *** as advised by client care 082111 to find out why I had received no delivery or any feedback. Was told out of stock and delivery would resume from 20th. By 24th no feedback or phone calls. Late afternoon the device was delivered at my office which I had already left for the day as no call to advise delivery. Called *** again where you do hold on for an average of 15-20 mins. Arranged delivery for 28th at my home address confirmed by the call centre agent and gave two numbers to call and confirm delivery time. Again no delivery or call. Phoned *** this morning (4th May) and was advised courier co had returned device as could not get hold of me. I dispute this as I had my phone on me all day. Told if I still wanted the device another 3-5 working days for delivery. REALLY? I am very busy at work and cannot wait around for Vodacom deliveries. I want the device delivered today or tomorrow latest or does Vodacom not want my business.