False information and unconfirmed information to clients

I have two contracts with Vodacom. One with the number ********** and the other with the number ********** 670. Yesterday I called to enquire when I could place a notice to cancel the contract with number ********** 670. The lady took my ID number and confirmed that the contract only ends in July 2020. To my knowlegde the contract ends this year July. After telling her this she was very quick to annouce that iPhone contracts are 3 years long. I said no because I have another phone and that contract is two years and I have another before that and the contract was two years. She than put me on hold for an extremely long time without advising why. I put the phone down. I need to know why consultants are giving false information and why I was never informed that the contract would be for three years as well. I do not want a three year contract.