Vodacom doesn't care.

I keep trying to cancel this Vodacom Data Refill thing (which I don't recall signing up for) on my prepaid number and NOTHING works. So if I run out of data, instead of capping my usage to R1 (which I opted for), it just automatically takes R3.50 from my airtime balance for 20mb of data for the day, until my airtime is depleted. Their social team was of NO help, and I cannot find a way to contact an agent. All roads lead to TOBI and that hasn't worked either. I am at a complete loss and contemplating taking this up to ICASA. Their standard response to visit a store. So now i must take time out of my work day to go and sort an issue I never signed up for.