Contract upgraded without consent

<p>One of my Contracts has been Upgraded without any consent from me.</p> <p>The specific contract has been on an month to month contract, and now it is on a 24 month conrtact with horrible benefits. Even caller ID has been removed.</p> <p> </p> <p>I have went to Vodacom shops numerous times and they just dont want to help me get the change reverted as i did not sign any agreement nor did i want the upgrade.</p> <p> </p>