Vodacom is a ripoff!!!!

I have a contract with for the past 2years. Last year I started experiencing connectivity problems and I called the customer support several times. Around October or November when I called, I was told that my contract will be ending end of November if I don’t renew it’ll go on a month to month basis. Then in December I’m debited almost twice my usual monthly payment and when I query Vodacom I’m told the contract has now gone into normal amount which is why I’m debited so much. Firstly, no one told me that this contract’s normal amount is and I also have another contract with Telkom which expired about a year ago and it’s on a month to month basis and I’m still paying more or less the same amount. Why is vodacom doubling it monthly payments and why is that information not communicated to clients???? I disputed this ripoff amount and now told I cannot cancel my contract until I agree to be ****** by Vodacom. I am prepared to pay what I normally pay and cancel this contract immediately. These service providers take their customers for a ride!!!!