Online upgrade... Gone wrong

I am not one to complain about much in life but i am seriously unhappy with the service i am receiving at the moment while trying to upgrade my contract. I did the upgrade online more than 2 weeks ago just to find out it was with a 3rd party company (don't even know how that works) now I am waiting for my device not knowing when I will receive it and literally being ignored by the person who assisted me, when I phone MTN call centre they keep on transferring me to people who can't help then i am given another number to phone which doesn't exist. I am really unhappy and at this stage i just want to cancel my contract with MTN and go to a provider who will treat me as a customer because this is not the treatment i am supposed to get, i am a paying customer not a charity case.

All i want is either my phone or someone to cancel my contract so that i can take my business somewhere else.