Charged for a cell phone we don't have

We bought a P8 Lite from Telkom Fourways at the end of September on a 24 month contract. The salesperson started the contract for a P8. We pointed this out to the salesperson. He claimed he couldn't cancel what he already had on the system for the P8, it could only be cancelled by a different department and he would escalate it to get this incorrect contract cancelled. We are two months down the line, and have been charged for the P8 that we don't have and never wanted, twice, for an amount in excess of R900! Despite numerous calls to the call centre and Fourways branch, nothing has been done to cancel this incorrect contract. According to the branch and the call centre they can't do anything to cancel this incorrect contract, it is done by a mysterious department who have no telephone number and can only be communicated with via email, but we can't have the email address, only Fourways and the call centre can email them. We have been assured on numerous occasions, by the Fourways branch and the call centre that we will have a response in 24 hours, from this mysterious department. It would appear that we have been ****med and are now being **** to by everyone at Telkom!