Train your call center staff please

I did an upgrade with vodacom on the 27th of October and I was charged twice the. Full contract value for October and November. Well at least that's the explanation that I got from Cindy from your call Centre who was not willing to help. I asked why I am charged twice and she says 'why do you mean why???' and then she puts me on hold and comes back speaking in zulu and I say I'm not zulu, then I asked abt money that was debited from my account and she says when was it debited? Then I say can't you see money was taken from my account then she says No! I am so disappointed in your service. The worst ever. Vodacom charges me a full subscription for a contract taken from the 27th, imagine only 3 days left then when you call for assistance you get attitude from their call center. I am going to make it my personal goal to close all these lines.