Bad Service

Hi there, please help me, I have upgraded my phone last Monday the 12-10-2015 and I was promised that it would be delivered to my work place the latest on Wednesday the 14th, but no delivery was made, I then called on the 14th to follow up and the lady I spoke to said the Samsung J5 I upgraded to was not on stock so I will have to wait a bit, as she didn't know when exactly it will be available, fine I waited and still no one from Cell C called me to apologize at least for the delay or something, until I called in today and held on for so long, I understand they were busy, someone picked up and he asked me all the security questions and I was put on hold for long after telling him my story, and he never came back I just surprisingly got the rating service afterwards, the guy I was speaking to didn't come back to me, but I thought maybe the call got cut then I phoned again, still some guy picked up again, he followed the same process and again he hung up the phone, imagine after holding on for someone to pick up, then when they pick up they hang up, and all I want is to know what is happening with my upgrade order, or has it been cancelled, please help.