Highly disappointed and angry

On Saturday 01-08-2015 I went into to mtn in foresthill city mall to get a contract, I needed two phones (I-phone 6), i was told network was down so they'd capture application and I should return on Sunday, when I got there Sunday I was only given ONE phone and was advised that the second one had a problem with the sim so they couldn't issue it. On Monday I was told they are still trying to sort out the problem. I only was given my second phone on Tuesday. Since then my sim is not working, it's written \no service"every time I insert it in the phone. I called call centre and was advised that it wasn't connected to network"