R1200 of credit cannot be transferred

I have R1200 on a sim card that I need to transfer to another sim and I have been told it cannot be done as \Vodacom has stopped doing it because they lose money"These are the words of the call centre agent. So I now have R1200 credit that I have paid for sitting on a sim. When I upgraded my account I was told that this data could be transferred so this is dishonest and a classic example of Corporate greed"""