Cancellation of contract and transfer of 4 GB data

I just had the most interesting experience with Vodacom cancelations Glenda and Customer services Amanda. I wanted to cancel my data number and transfer 4GB data on the same account from the data number to the main number and cancel the data number. I've been told it can't be done and even if you pay (not free data) you lose the data. What I've been told as a Vodacom client since the beginning of Vodacom they take your money and you lose the good you pay for. This is plain *****ing from the client. But pay late or don't pay your contract for 1 month and see how quickly they stop your service and start legal action. But they can take what you paid for. I'm waiting for the client service to get back within 24hours or will stop debit order and see how fast I will have a response.