Disgusting service

I upgraded my device on Tuesday 2nd December to date I have not received my device. I have been given the run around from both cell c and courier it. I logged a complaint this morning with a customer care manager by the name of Amanda and still have not received a call with a solution. I will log a separate complaint for courier IT as the lady promised a delivery tomorrow but when tracking my order the update says returned to sender. I have been calling cell c and nobody is able or rather willing to assist. I have been transferred to 145 which the number disconnects. I have been with cell c for over 10 years and I am disgusted in their service and unwillingness to assist me.