Cancellation issues

I've completed the cancellation procedure with 30 day advance notice. Received no feedback as to whether the service has been cancelled. A week later I logged into my profile to find that an amount of R1600 extra is going to be debited from my account. Phoned the call center and I have been advised that this is a cancellation penalty for the router.

When I initially took the service I was told that the router is free to use and would become mine if I used the service for 6 months (I've been with Supersonic for about a year). Perhaps I misunderstood but I asked for the recording and received nothing as of yet. Now I'm being told that I have to return the router at my own cost (bear in mind I didn't need this router; it just made sense to get it if it becomes mine in 6 months which is what I understood). I have no use for the router so I'd gladly send it back just not at my own cost; I've had colleagues that were on the service that had their routers picked up. This is an absolute **** of a company. Never returning to Supersonic!!!