paying for a contract that i dont have, terrible aftersales

In October 2017, my Telkom cellphone contract came to an end, I was told by the ballito Telkom store that I would need to take a sim only contract to keep my number which is ludicrous. I agreed (because my number is important) and took a free me 1GB month to month contract according to the lady at the Telkom store. She advised me that I can cancel anytime as it was not a post-paid contract. The data in said contract finished too quickly so I went into the Telkom store again and was told that I need to take a cellphone contract as it is more feasible. We decided on the Huawei Nova @ R219 a month with 10GB free data for the first 3 months. To date, I have not received any extra data and my bill is averaging R318 a month, how is this possible when I signed up for a R219 contract?. Furthermore, I was assured that the free me 1GB sim only was canceled when I took the Huawei nova. I cannot do any banking, I cannot even use this phone because there is no data on it. I am paying R318 a month for what? Is this the way that Telkom treats its own customers. I have phoned the Telkom call center’s and I have visited other Telkom stores and still no one can seem to understand what is going on. Its like everyone is trying to push me between the call centres and telkom stores.