Telkom makes it impossible to cancel their service

This story is a bit ridiculous. Telkom managed to sell my parents two ADSL lines at their property. Both lines' actual speeds are 1mbps, but for the one, we pay as if it were a 2mbps line. We also pay for two phone lines. <br> <br> After seeing this I attempted to cancel this service, but was told that this is impossible in-store. The Call center puts me through to cancellations (after sighing at my request), and the cancellations department NEVER picks up. I have waited 30+mins multiple times over the last few days.<br> <br> This is ****************. I would appreciate any advice on how to handle this matter further.