Blatant theft from my bank account

I called to upgrade to the sim only red VIP package but after a few hours decided that this is not what i want and the very next day i called to cancell. I was told that it was cancelled only to discover it wasnt. I phoned in a couple more times with no service at all until finally i was assured that it was now cancelled. Today they debited my bank account with the subscription amount that was supposed to be cancelled. Vodacom, you have about 2hours to give me back my money before i open a case of theft with the South African Police and then i will start spreading the word for others to follow me! Ive asked nicely plenty enough times.