Upgrade gone bad

I've been trying to upgrade for more than a month. Eventually completed it mid January, only for the courier company to return the package due to the wrong contact number being given to them. Called Vodacom on several occassions only to be told that they cant assist me because my number is on their old system and someone would call me back. No one ever called me back. Called on Monday and finally spoke to a agent in the complaints dept who assisted in reversing the upgrade and redoing it. Today, i've again called a few times to get the order or waybill number so i can track the parcel. Again everyone i spoke told me they dont have access to the old system. I don't know what to do anymore.