No handset received after upgrade, inspite of MANY calls to Vodacom

I upgraded my Vodacom contract on 10 September 2017 via the internet, promised delivery the next day. To date I have not received any correspondence from Vodacom. I already spoke to the upgrade department and the operators reported that they escalated the query. Two days ago the operator said that she will request a supervisor to cancel the upgrade, to enable me to do the upgrade again. This has also not been done. This means that I upgraded, did not receive my cell phone and no-one at Vodacom is willing to assist me. I think they have by now run out of excuses. apparently there was an internet problem (????) when I did the upgrade, but that is not my problem at all and Vodacom must solve their own internet problems. I will appreciate it if someone can assist me that is willing to solve my problem!!!!!!!!!!