Collection of device

I have been calling MTN call center since weekend. On Saturday I hold the line for over an hour with no assistance. I decided to call back on Monday, only then I got to talk to the agent of MTN but he told me he cannot assist so he is going to send an email to Prince the guy who sold me the BlackBerry Z3 device. How is it a \Sales Consultant"has to give me a call back to arrange collection when his job is to sell? That is very *********** of MTN! MTN is a very big respectable company which I do respect but the people you guys employ are very *********** or do I need to speak my home language to be assisted properly? It is Wednesday and still I am sitting here with a device that is not working and still have not received a call from Prince as they said he will call on Monday. If any one is actually reading this please do not respond to this by telling me how sorry you are. I don't want you to be sorry I want you to tell me you are sending RTT to come collect the device. Everyday I have to carry this phone to work which is not working because I do not know when you are going to collect it. It puts me in danger because what if I get ******? Will you then pay the contract? """