Dufficult to move from contract to Prepaid

My contract has reached the end of the contract term on 01/10/2015. I wanted to carry on month to month, and quried at a store if this was possible. They said no problem, and then, tried to cancel the included data bundle on the contract, which is now chargeable. Was told there was a problem and it was being sent to technical. Follwed up a a week later and was told that is not possible and I have to convert to prepaid if I want to cancel. So went into a store and put in a cancel request. No contact made, went back to the store and was told that the ticket was closed as incorrect contact number given. Must log a new ticket. Insisted on seeing the screen, and the correct contact number was there. Ticket was sent back, but no response yet. It is now 2 months that I am being charged 349 per month for something I dont want. Who can help sort this out before the next billing run in a week.<br> <br> This is not the first time a contract ending has given me grief at Telkom.