Billed for nothing! No device issued

I've been trying to get the I Phone 6s 128 GB since end of October, its been 2 months now and I still havent got the phone. I've been dealing with the call centre as I registered for this deal on line, its still advertised on the website yet they tell me that there is no stock. I've been billed R399 and an agent even contacted me to confirm my delivery address but I still havent received the device. I've made numerous calls and I've been chatting to agents, I even visited a store but I am still waiting.

If there is no stock then it shouldnt be advertised on their website for the 3rd consecutive month. The agent stated that the website only gets updated on the 20th of every month when they receive stock. I've been calling almost every week to find out about the status of my contract yet nobody calls me back to inform whats going.

I want the Iphone 6s 128GB for R399 as advertised or I want another phone with the same storage space and I will not be paying extra.

Another excuse they come up with is that the 5 security questions have been blocked and they have no idea how to unblock it.

Please can this resolved asap.