Vodacom can't help with my migration request

My wife and I are both on month to month on our contracts. We are trying to migrate from our current contracts to the Smart Top Up S + package, still on a month to month basis. We don't want to upgrade, just migrate. I've spoken to customer care who confirmed that I could migrate and still remain on a month to month package. However it seems there is a problem with your system as customer care tried to assist with the migration but had issues with the system hanging. I also went to two Vodacom shops where nobody was able to assist me. They seem to be keen only on getting me to upgrade. I am starting to think that this is all a ploy tactic to frustrate me so that I eventually just do an upgrade and tie myself up for another 24 month contract.

CAN SOMEONE COMPETENT IN VODACOM PLEASE ASSIST US TO MIGRATE??????