Incorrect Delivery, Unresponsive Call Centre

I did an upgrade on Monday 21 Sept. I received a delivery on Wed 23rd. However the invoice was made out to the incorrect person, and courier took the parcel back. For two days I tried to get through on 084145 but unsuccessful. Once I contacted them on Facebook, did I only receive a response (compliments to FB team). I received the second delivery Monday 28th. But when I opened the parcel, it was the incorrect phone - different from what is stated on the invoice. AGAIN unable to get through. The only response is when you select 'new contract' option, then you get through to an operator immediately. They told me to phone 084143, who then ONCE AGAIN placed me on hold to the follow up dept, to arrange delivery/collecion of incorrect phone. I eventually put the phone down. I am more upset about the fact that it seems Cell C only responds to new customers, and is not willing to allocate Call Centre staff to service their existing customers. i am now going to cancel my upgrade, and port my number to another service provider.