Vodacom D3 System Upgrade - TERRIBLE, TERRIBLE!!

I need to upgrade my cellphone contract, which was due on 5 December. Since then I have been in Vodacom every singe day to upgrade my phone, but with no success! I have been migrated to a D3 (WHAT ON EARTH IS THIS???) system, and I didn't get notified of this and definitely didn't give any permission! Not all Vodacom shops can assist customers migrated to this system and the ones that can, is offline all the time. Offline or not trained properly?? Point is: I have been paying my bill on time every month for the last 16 years and now I can't upgrade my contract!!! I am cancelling my contract with Vodacom (and all my family members contracts as well...) This is ridiculous!!!