Vodacom WORST customer service, WORST service provider!

Vodacom are absolute ********! After calling them in November to enquire about my current data contract we were told that there is one month remaining and if we want to cancel they will charge us a cancellation fee. THEN at the end of November we were debited double the amount, nearly R700! When we called they told us that our contract expired at the end of November and we were now charged the month-to-month rate! This was absolutely ridiculously, and we immediately cancelled, the next day our data vanished. They had charged us R700 for 30G of data for December then took it away! We had already paid for it! Whenever you try to call their agents the call gets cancelled or you are placed on hold, absolutely worst customer service imaginable, how is it that they made it almost impossible to cancel our contract by charging a ridiculous cancellation fee then they still ****** us of our data we already paid for.