Telkom NOT cancelling my account two years later.

I 'had' a Telkom mobile data subscription, I sent a cancellation request on the 23rd of October 2017, but it was never cancelled. I've since sent multiple cancellation letters as well as following up, and chatting to Telkom via Facebook, but still, two years down the line, it hasn't been cancelled. Can someone PLEASE CANCEL this already and refund me for the months I cancelled and been paying for something