Vodacom stole my credit

They just took my credit and did not replenish my data. If my husband were not sitting next to me and observing this - it would be hard to believe. When I called the customer service number to get help, there are no people to speak to for assistance and there are no options for what I need help with. Vodacom stole my credit. When I went onto the app, my balance was over R230 and when I tried purchasing data for R85, my credit balances reset to R63 and there was no data available. How many people are they doing this to?