Pathetic service of cell c

If only I could rate 0 stars. The service I received from them is extremely poor and very frustrating. I ordered a contract phone on the 10th of May, my paper work was finalised on the 19th of May. On the 20th of May I got confirmation that courier it will be delivering however the address they had was an old address I used 8 years ago. Tried to call to update this but no one assisted till today the courier still has the incorrect address and refuse to change it without Cell C’s go ahead. Cell C agents are useless I have been calling to fix this but nothing, now they can’t even assist with cancelling this order since delivery is not possible