Completely fed up with TELKOM

I wanted to cancel my subscription with Telkom as I am no longer living in my old place and first I was messed around from one branch to another, in the end I did everything via email. Well they say someone \WILL contact me within 48-72 hours""; it is now the 22nd. Telkom;I will NOT pay anything after the 9th of December and I am prepared to do whatever it takes to stick to my word. I will not pay for a service that I am not using and where I have done everything in my power to terminate it. Your service is appalling and unacceptable. This is the second time I have a big problem with you and I am completely fed up!"""