AGENTS Imompeted or just trained to be *********??

On wanting to cancel a contract with Vodacom, I was given an alternative offer, stating the amount that my next debit order would be, & the benefits of the new offer. I have sent several emails requesting CONFIRMATION of the new agreement, & receive NO RESPONSE, &: have just received the invoice with NO CHANGES!!. ALSO, early June, we were told by an agent that my husband's contract can be cancelled on the 1st July, on doing so, the story changes, now told we have to give 30 days notice. VODACOM just continues to try & **** consumers, even if it's just with an extra month's payment. COME ON SA, There are other service providers out there,, choose one that can be trusted.