Sale with incorrect info

I received a call from Stephen who could see on my records that I had a month to month contract for a 500 mb data for R100.00. The sales pitch was that I would pay an additional R10 and could receive 2 Gigs of data which I was suspicious about and kept asking questions. He failed to explain that I would be paying R109.00 for a new contract for 2 gigs of data and had to cancel the existing month to month 500 mb contract with Vodacom. I had queried this with Vodacom who requested Mondo to retrieve the call and listened to the call. I received a call from Bianca explaining that their consultant Stephen was at fault for not answering my question and providing more info in terms of the router, she said due to the consultant being at fault she will speak to her manage and call me the next day which she failed to do. I contacted Mondo and sent 2 emails requesting for Bianca to advise on the outcome. She informed me that Mondo can unfortunately not anything else but cancel the contract and I should courier the router back to them. I would like to know if this contract is now cancelled and that I will be refunded for the deductions of my account in September?