Online Upgrade nightmare - no transparency!!!!!

I've been with Vodacom for years - so the upgrade process is not new to me. I know for a fact that if you qualify for an upgrade, you will not be paying for the current contract and the newly upgraded contract - I mean that is logic right!? That's what I thought too - so I've upgraded online because I was notified that I qualified for a new contract as the one I have was coming to an end. My thinking is that i order it and all will be effective and run concurrently with the end of the old contract. I was pleasantly surprised when i received communication of my delivery of the new phone. Now Vodacom wants to charge me 2 contracts at the same time- meaning that end on November I have to pay R2000 for two contracts!!! Like how can you do that - where is TCF in that - transparency in your dealings? I cannot afford to pay for 2 contracts obviously -that's why i only had before - where is the affordability analysis for you to believe that i can afford 2 contracts. You misled me and were not transparent. I called the Call Centre and the consultant ( Lefa) -advised that because i did this upgrade online - i would not have known this information ( if i'd gone to a shop i would have been advised). So online services give half the information - then why have this online facility if not all information will be disclosed? I cannot afford to pay you R2000 - please make contact with me to fix this.