Hot deal on 40GB

MTN has officially advertised "Get double the Data plus free USB modem" HOT DEAL 40GB for the 1st 2000 customers which I saw yesterday. I went about 5 MTN stores yesterday and today of which neither of the stores had no stock. I then resorted to online store and customer service to register my complain which yielded yet another disaster as none of their department were willing to offer me options. Why would you advertise something that is not available? This is a bad service as no one has ever offered me options to load my application whilst waiting for stock. I am very disappointed to say the list with he level of service experienced with MTN.