Once again Telkom doesn't do what was agreed!!!

During May I tried to call to give notice on my Telkom line. No one answered. Eventually someone got through to me an then cancelled my line immediately when I only wanted it cancelled for the end of the month! Once again I was holding the line for 40 minutes when someone reinstated my service and then said it would be cancelled from 6 June as per my request. Now I received a HUGE bill as well as connection charges for next month! Seriously. I want my money back!!!!!!