Getting overcharged after upgrade (again!!!)

<p>After upgrading one of my cellphone contracts (I signed a contract with reduced subscription of R338 per month), I am being billed for the amount of R488 per month. I have tried numerous times to get hold of someone at Vodacom to explain what is going on... The people at their customer service are useless, and Vodacom does not call back after requesting a call bac****</p> <p> </p> <p>I am still waiting for Zama and Kgahiso to call me back as promised...</p> <p> </p> <p>I have requested a copy of the signed contract (I upgraded the contract at the Vodacom store in Rivonia), but now no-one know where to find the signed contract???? Why am I being billed for more than the amount I signed for??? Why can no-one at Vodacom explain what is going on? why have I not received my invoice via e-mail last month? Why do you not follow up on your call back promises?</p>