no delivery or feedback

I spoke to Prince Mbuso Mhlongo about a week and a half ago regarding a new contract and he took all my details and finalized everything, so the people try to phone me for delivery but could not get hold of me. I Emailed Prince again to ask him to let the people phone me an my office number to do delivery of my phone as my cell does not work properly and he did that. I havent heard anything from nobody since last week friday and even if i try to phone mtn on *** the phone just rings or it gives a engage tone or something. I really need my new phone but this week i have been sending Prince emails aswell and he is not responding. I need to know what the problem is and if i need to go to another service provider or what! This is really not nice from MTN..Im not yet 100% a new customer but already I have problems with them. will appreciate if you can look into the matter