Extremely Poor Service from CELL C Upgrades and Customer care.

I recently upgraded my contract, 12/02/2021. A 3 to 7 day turn around time was indicated, but no delivery was received. I then called the customer care to query and was advised that it was with the courier company and that they would call me to arrange delivery. I then waited but never received the call. I called once again and queried the status to which a response that the courier company could not contact me and that the device was returned to CellC. I never once received a call or missed a call form the courier company and on querying on what number was given to the courier company, it was established that CellC had given the incorrect number, in this period CellC now wants me to restart the process which was not due to any fault of mine. I insisted that I will do no such thing and that the device must be delivered to me. Disputes were logged with customer care, upgrades departments with promises of 2 day turnaround times with no joy to date. I have noticed that there is the refusal by the CellC staff to accept accountability and to correct their mistakes. The customer service just is not a customer service as there is no action received from them. It is now over 15 days that matter hasn't been resolved and seriously considering moving to MTN or VODACOM.