Bad service for Business upgrade centre

I called business upgrade centre at 8:10AM on 23 November 2017 to get an upgrade for iPhone X, the lady Jerusha spoke to me and sent me the requirement for upgrade, at 2 PM I called her just want to make sure she did receive my documents for upgrade and her colleague told me she out for lunch will leave a message to her and call me back, and I was waiting, the second day I called her again at 11AM (24-11-2017) her colleague told me that she was busy with another call and will get back to me once done, I asked the colleague just help me to confirm that she had received my upgrade document, the colleague checked and rep**** me received, but she never called me!! This morning 8AM (28-11-2017) I called again, finally I get hold of Jerusha , and she said had never received my mail, then I had to resend her again and now she told me that the phone is on the highly demand so she cannot promise I would get it this December , as a loyalty customer of Vodacom for more then 8 years, i really can’t accept this kind of service ! How ridiculous is the service!! Please remember all email sent there is always a record in the mail box, and of course I double checked before I called!