No Feedback - No Response

October 2015 I was contacted to upgrade my Cell C contract. The upgrade was done, but the wrong phone delivered. Cell C arranged for the wrong phone to be picked up again on the same day, but since then I have been trying to get the upgrade reversed to get another phone. When I call the upgrade dept, they put me through to the follow up dept who puts me through to the upgrade dept. I was told an unauthorized person tried to reverse the upgrade and the system now shows an error and it will be reported to a team leader. I have been phoning for feedback every week, but not getting the answers I need. All I want is for the upgrade to be reversed to renew the contract and request a new phone for delivery.