False advertising (no stock)

My wife and I went into the Telkom Mobile store at Fourways Mall to apply for contracts for the iPhone 6 on Sunday 1 February 2015. The lady assisting us with our applications said that stock would arrive on Thursday 5 February 2015. She called me on Wednesday 4 February to say that my application had been approved but did not call me back the following day with regards to the phone. On Sunday 8 February I called to enquire on my phone and was informed that the stock would arrive on Tuesday 10 February 2015. When I called to enquire on Tuesday 10 February 2015 I was told by Zack that stock would only arrive the following Thursday 19 February 2015. I asked to speak to the manager who claimed that there is a world shortage of the phone and that even 19 February 2015 is unlikely. This debacle is now costing us money that we didn't budget for as we've been purchasing data in small amounts due to expecting imminent delivery of our contract (which includes free data) phones whereas we normally buy data in bulk (cheaper) for the month. I would like to have my and my wife's phones delivered immediately.