HORRIBLE CLIENT SERVICE. I HATE HOW THEY HAVE DISRESPECTED ME.

i have been trying to cancel my telkom let /wifi account and have even paid more than i need to and requested cancellation multiple times and they still are not cancelling my account. i am furious with the trauma they are putting me through with calls and sms's but nobody is cancelling my account. it has now more than doubled in charges but they still are not cancelling my account. i need this to stop. if ANYONE can help me with advise. Telkom is the absolute worst service provider i have ever delt with in my entire life. their lawyers are now harassing me too and i have proof of my cancellation, but they just won't stop! i want to be rid of them and i want that OLD account closed.