How long does it take you people to cancel a line?

The above line was cancelled in September last year, Its now march and you telling me they can't perform a cancellation in 7 months? we have phoned the cancellations department sent through the documents a numerous times and all we get from the call center is \ yes we can see your correspondence and you must wait until someone calls you"how long does it take to call us? being in business with telkom is like being in a contract with the devil"