MISLEADING Vodacom data deals

I am really dissatisfied with Vodacom. They called me last week with an "amazing data deal". I never fall for telesales, but this really seemed like a good deal. I would get 10 gigs data during the day and 10 gigs night data. The lady assured me that I can transfer the data to my current number and would only have to put the new sim card into a phone the first time to do the transfer, after that the data will automatically be transferred to my current number every month. After struggling with the delivery of the sim card, I finally received it yesterday. Guess what? I am not able to transfer the data to my current number!!!! After holding on for 35 minutes to speak to a consultant at Vodacom today, he said that only purchased data can be transferred and not contract data. He then referred me to the company who does the telesales. The consultant there explained that data can only be transferred from top up to top up (which I am on and the new contract is), so I am still confused. He suggested I cancel the contract. It seems as though Vodacom are misleading customers or don't know how their products work. They have once again reminded me why I never fall for telesales. I guess the joke is on me...