Promotional Items not available the whole month

I noticed an Apple MacBook on promotion in the April Yello magazine, I've been calling the whole month and of the 4 laptops on the April Promotion MTN only had the one laptop in stock the whole month? I do not understand how something can be published as a promotional item but not be in stock for a whole month at all. Why advertise 4 laptops when in fact you only have one type available, interesting enough the one with the weakest specs compared to the others. I asked the Call Center if they could check for me at which MTN I could find stock and was informed that they can't do that. Thus I have to personally contact every MTN store to find stock myself? What is the use of MTN Direct then? I'm currently in Kroonstad Free State and had to go to Jhb this month, the ideal opportunity to collect a laptop at any MTN store in Jhb but none of the stores I contacted could help me? Even though the MTN signal in my area is pathetic I'm still a huge MTN fan and have been for years but this was truly very disappointing.