Telkom ********* Behaviour

I placed an order for an iPhone on the 12 October at Telkom online. A consultant called me back and took me through the entire cintract and he advised that they do ndeed have stock available. It was then approved and on the 16th October they deducted the first instalment of R799 from my account, however I did not receive the device. It's now exactly a week later and still have not received the device and they do not get back to me when trying to call them and request a call back. I just contacted them via the live chat and I was advised they have no stock and only the sales department can help. I am getting no joy from them. It's not ethical to deduct a client's money from their bank account without them receiving the product, hence them drawing interest on people's money. Please can I urgently get this resolved.