Angry and Annoyed Customer (Cancellation of online upgrade)

I did an online cell phone upgrade online on the 22 march 2018. One of the Telkom agents called me to process the application on the 22 March and provided me with a tracking number which I would start using after 48 hours to track delivery of the cellphone. i was also told that the turnaround time will be 4 - 7 working days. I still haven't received the device. I went to Telkom walk in store to try and do the upgrade there rather and they couldn't assist me since the was already an upgrade pending on my name. The agent sent and email to the cancellations department. i called Telkom (10213) to try and speed up the process since I desperately need a new cell phone. I was sent from Pillar to Post and the issue is still not resolved. I sent and email to the agent who assisted me with the upgrade and she is also telling me that she cannot assist me. I'm very angry and annoyed with Telkom and have a good mind of ending my relationship with them.