Mondovodacom

Vodacom is useless. I was called by Mondovodacom to offer me an upgrade. the deal sounded good, same services that I had at half the price. When I got a confirmation sms the calls and SMS's were half and the data was less than half of what I had. I called Mondovodacom and asked them to reverse the "upgrade". 8 days later it is still not done, Thulisile Mkhize says my ID number isn't on their system and I must send them my "Proper" ID number. How did they change the package without my proper ID number? Why can't they reverse it? Vodacom head office say they cannot do anything until mondovodacom reverse the upgrade