Poor service vodacom.

In October I took an advance on my contract for data, stupid of me resulting in a bill of over a R1000. Not knowing or being informed that the advance I a recurring advance, meaning it will be added to my bill every month, I'm stuck with these huge bills. It's on my fiance's name so obviously they won't assist me in canceling it. She called 3 times and got told she would be phoned back. I now noticed that it's been added again so huge surprise for me end of December. Peter please help me. They should contact my fiance and cancel the subscription to this reaccuring advance.