Unable to return celphones on cancelled contract

On 12 July I entered into a contract with Telkom for a voice service at the Kolonnade Shopping Centre. Regretably when we returned home, the service was not available as Telkom had no covarage in our area. They were not able to diliver on the contract, and the contract was terminated. The debit order was cancelled and Telkom was notified that it would be. The cellphones were reset to the factory default and packed with all the accesories and I have been trying to return them ever since. I was told that the telkom shop in Kolonnade would contact me, to arrange for the return, but this is simply not happening. This morning I took the phones to them, but they were off line, and not able to process the return. Despite not being able to provide a service I am also still getting billed, even though the service not being available. There seems to be poor communication on the matter, so I am now resorting to Hellopeter to try and resolve the matter.