Terrible service!

Almost a year and still an open dispute...….. The most terrible experience!! And still its going on. Every time I speak to a different consultant and with no luck I am still on blacklist for an account which should have been cancelled in Dec 2017. Telkom keeps billing me even though I have no line. It has never been moved since we relocated. I phone every 2 weeks, hours and hours of waisted time... when will it end??