CANCEL TELKOM LINE

I HAVE CONTACTED TELKOM SEVERAL TIMES TO CANCEL MY HOME LINE, THE AGENTS I SPEAK TO SAY IT HAS BEEN DONE BUT THE LINE REMAINS ACTIVE, I TRIED TO ALSO CANCEL ON THE TELKOM WEBSITE BUT I AM UNABLE TO DO SO, WHAT WILL IT TAKE TO CANCEL MY LINE, IS IT SI DIFICULT TO DO SO, I DONT NEED THE LINE ANY LONGER.