Bad service and billing issues

I am very unhappy with the service received. I was paying on average R1900 a month on my contract and went into the store to migrate my package down as I no longer needed the benefits of a business contract. I asked the consultant what the penalty would be and what I needed to pay upfront as I have a high end handset on that contract. It was all worked out u was told to pay an amount which I did to migrate and bring my monthly bill down. I migrated down in September and am still pay I high outrageous bill with less than half the benefits!! After queuing this at the store I was told I am paying for my handset on top of the contract which basically puts me right where I started with a high monthly bill. This was not disclosed by the consultant at the time and then to be told its in the contract you signed!! I signed it after trusting the consultant and what I was told by her! Train your staff because this is unacceptable