Cannot cancel line

We are moving out of a flat in JHB at the end of December. I have submitted several applications to cancel the service since the beginning of November. Telkom REFUSE to call me back because they want to ENFORCE an extra 30 days onto me at the end of December. There is no reference number in the acceptance emails I receive from ********** It seems there is absolutely no way at all to get a Telkom line cacelled.