Unauthorized upgrades

Highly disappointed vodacom customer need to be very vigilant on when your contract is due to end. Other wise you find yourself in another two year contract that you never took out. All my upgrades I do online due to the convenience of online upgrades. While I was checking when my lines were due for an upgrade as I knew there was one that was due to be upgrade to my horror there was none. Just for me to phone in to find out that a upgrade was done for a sim only deal. Which I would never do. If I had to upgrade I would do so with a device not just a sim.