Bogus Upgrade Which We Must Pay For!!!

Last year someone from the Durban branch of Vodacom called and offered to save money on a particular upgrade, my boss said ok subject to sorting out with me. I then returned the phone to the sender and told them no upgrade. Guess what he got the phone and I have called and tried to sort with Jhb to no avail. We did not upgrade and we are being charged for a new phone and still this has not been sorted!!!! I give up with people who make promises that they do not keep especially from a Corporate Company!!! Vodacom GET YOUR ACT TOGETHER!!!