Bad service

Telkom got worst service in SA , they don't communicate , they don't respond to the query or request, when comes to upgrades they call 10 times in a week .., ADSL - they cannot move my line to my new place because i'm due with R800 , but when they debit twice from my Account & never reverse it back .. I would like to cancel all my contracts & Lines with Telkom immediately - pls send me procedure how can i do that .. Contact me - ********** 597