"LOYAL CUSTOMER" does NOT get what she deserves!!!

As a loyal customer of Vodacom for over 10 years, I was approached by MONDO, a rewards company used by Vodacom to entice customers to take out new contracts. I was first told by the call-agent that Vodacom would like to reward me for being a 'loyal' customer of theirs and would offer me a mobile Wi-Fi at "NO EXTRA CHARGE". She told me I was paying too much for data and with the new Wi-Fi device it would cost me less. After I very specifically told the call-agent that I could not afford to pay more than I was paying for my contract she told me I would actually be paying less. I was paying R607.49 on my existing 'pay as you go' contract which has gone up to R1 089.66!! I have reported this both to Vodacom and MONDO to please help and sort this out; as it would be very clear once listening to the phone recording I did not want to pay more. Need-less to say, I was given reference numbers (1- ********** ********** : Vodacom) and (8056 : MONDO) and told I would be contacted within 3-5 working days, which I am still waiting for!! All I want to do is cancel this contract, or get what I was promised.