Incompentent Online store

On 7 July I decided to take a deal on the online store and got an email to say "one of our call centre agents will contact you within the next 24 hours in order to finish processing your application "do you think I got that call? After waiting for the call that did not happen I decided to call the number on the email if you don't hear anything back only to hear an agent tell me rudely "that there is no such deal", so I decided to call again and talk to a competent call centre agent. The agent that helped me was really nice and went with me through the ordering process on the website to find that the deal does infact exist, though the problem is that it doesn't pick up on Vodacom's side. The agent response is that she would talk to her supervisor to find out if she could honor the deal as advertised. I got a email the next day to say that she will be in contact once feedback has been received. Its been a week and I haven't gotten any feedback on the matter, I have followed up twice and haven't gotten a response. This is really terrible service from Vodacom Online store, as I don't know how it takes a week to get feedback on the matter and that there isn't even the decency from your agent to respond to my emails.