Still incorrectly billed?

After being assured of my billing being resolved with the previous complaint I find that I am still being billed for ADSL which I do not have. I am in arrears again? And a gentleman from Telkom phoned me offering me fibre? Which I already have? And he can't see that I have fibre? This is ridiculous. I am very disappointed by Telkom's staff not being able to rectify a simple problem.