Vodacom telephone sales agents deliberately lying to make a sale

I had a Vodacom contract on an iPad coming to and end in October 2019 which I planned on closing. Shortly before the contract was due to come to an end I received a call from the Vodacom call centre offering me a data only package. I initially declined the offer, but after being told that we would be able to transfer the data to other numbers on our contract, I accepted. I made sure to ask the agent more than once that I would be able to transfer the data.

From October to December I attempted to transfer data to one of the other numbers on my contract, with no success. At end December I eventually took the iPad into the Vodacom store in Longbeach Mall in Noordhoek to ask for their assistance. They informed me that it's not possible to transfer data between numbers, and that the Vodacom agents selling products over the phone are aware of this but continue to falsely inform clients. Apparently this is a regular issue with clients going to that store.

I was given a number to call to cancel the contract, which I did, but a week later this has still not happened. Based on the fact that Vodacom is selling products using information that is false, and which they know to be incorrect, I want the contract cancelled as well as a refund for the months already paid.