Telkom mobile contract cancellation

<p>I took out a Telkom Mobile LTE contract for 24 months, including the router. The contract finished in November 2016. Telkom is now charging me for the data and not the router. I've attempted to cancel the contract via phone calls. email and went to the Fourways store 3 times. I have a case number dated 6'th December for cancellation. However, I'm still being charged for data. This seems like Hotel California, "you can check out but you can never leave". The real problem appears to be imcompetence. </p>