Incredibly frustrating customer journey with Vodacom Call Center

Where do I begin with the shocking service delivery from Vodacom and their call center. Trying to upgrade my phone as my previous phone was ******. The exact number of times I have called the call center is 8. Eventually, received correspondence from the call center that the upgrade has not been processed and they will send it for processing. This happened twice, so I followed the same process explaining the issue and eventually speaking to the manager called "Phillip" said they will process my upgrade (quotation number ********** 9). Three weeks have passed and I simply would like to follow up on the upgrade, so I call the call center for the 9th time and all that the call center agent says today is that she "is still on the old system and unfortunately cannot check" and that I need to call back later, so I could do nothing but just put down the phone before I seriously start shouting at this person. It is not my problem that Vodacom has upgraded their systems and some agents dont "have access to the new system" sending the customer on a runaround from one agent to the next without resolving the issue. Shocking call center, shocking customer journey process from Vodacom.