Cannot cancel service

<p>I have emigrated, and as part of that process I communicated a cancellation to Telkom well in advance of my leaving the country. Needless to say, they have dropped the ball completely, completely ignoring multiple requests to cancel, and accumulating a bill with no sign of stopping.</p> <p> </p> <p>I sent through my cancellation on the 24th August, again on the 24th September.</p> <p> </p> <p>No joy.</p> <p> </p> <p>Is this the only way they keep their customers? By force?</p>