Incorrect billing, no customer service

I pay my vodacom account every month eft by 30th. I was informed today, I must pay R298 EXTRA and it's the 7th of the month. I got hold of client services after holding on so long listening to their ads and *******,then the line got cut and I had to call again and after 13 mins I was told system is slow and they will call me back. Whatever... I got my husband to call as I was on the brink of a heartattack. I was informed I subscribed to some ******* ***yd sms data.I'm so angry. this is *******. I don't subscribe to anything, cause it costs money, so someone is making money on ******* actions. I had.to pay to not block my phone. What is happening to any form of service in this country. *******