Pathetic Service Once Again

My Telkom mobile service was due to be cancelled on 30 June 2017, I had emailed my cancellation forms through on 23 May 2017. Telkom continued debiting my account despite several emails to different managers and departments and call center agents. They have finally resolved my case but refuse to issue any refund as they say that I did not give them enough notice. I would hate to think that in such a large organisation there is not a single person who is competent enough to get this right. I have paper trails which have been mailed to numerous people to no avail.

Is there anyone who can assist me with my refund from July last year?