Telephonic UPGADES - Disaster

I was contacted last week by a very persistent consultant from Cell C to process my Cellphone Contract that was eligible for a Renewal. At first I was not at all interested in doing it this way, because of the Huge margin for error, (what in this case proved to be the case.) I then finally gave in, after the consultant made it sound very attractive, and he also agreed that i will be receiving my GOLD IPHONE 6 within the same week. When the courier company arrived -Friday 10 April 2015 ,they asked me to sign, and in return I received the box containing my new phone. (According to me supposing to be the GOLD IPHONE 6 as i ordered) When i opened the box it was anything but the phone i ordered (IPHONE 5C WHITE)was in the box. i then realized it was the wrong phone, and asked RAM(the Courier Company) to take the phone and return it because it is the wrong phone. They then refused, as i have already signed. I then phone the call centre to notify them of there error - I was then notified that the wrong phone would be collected by today.(Still haven't) and then i have to wait up to 14 WORKING DAYS FOR MY NEW PHONE! This is UNACCEPTABLE why must i wait with no phone, if CELLC IS AT FAULT