Disgusting Service

I'm turning to Hello Peter because I've had enough of this company's bad service. I app**** for an iphone 6 contract with a guy called TP and he confirmed that it was approved and i will have my phone in a weeks time. After 2 weeks of not hearing from the guy i went back to the branch and after waiting for 2 hours to be attended to i was told my phone hasn't arrived. After a month of waiting i was able to get hold of the area manager Michael he told me he has sent Brenda to get my phone from the Northgate branch. I went back to the Eastgate branch on the 27th of Nov and I was told by Brenda that she couldn't get the phone i must opt for another phone available in store. I then opted for the Sony M5, after another hour of waiting i was told my application has been declined and they couldn't give me a reason why. A week later i turned to the area manager and explained the whole incident to him, he promised to follow up on the matter and he told me my 2nd application has been declined because i have an existing contract with them which i know nothing of. So isn't it common sense that my iphone contract is the one causing my Sony application to decline. I'm disgusted and i need answers