Unable to cancel contract

<p>I have a data contract at vodacom I am trying to cancel. I have phoned the Call centre the first time in October, passed all the security questions. But was told I can only cancel the contract on the 1st of November??? Now I phone today 1 November, I am put on hold for half an hour at Customer Care. I pushed the button for Cancellations, and are told I am at the Cancellation department. But then person tell me I am not, I must phone another number ********** ??? Then another half an hour on hold!!! Than another person, asking me about 10 funny questions they generate for security purposes from my id nr. Then I am told I did not pass, probably because they have old data of me on the system. And then I am told my account are locked for 24 hours. She cant help me. PLEASE HELP ME TO CANCEL THIS CONTRACT!!! I fear this is a trick to keep in the contract another 2 years...</p>