Dont get more useless than Telkom- Will never use them

Worse service ever received by Telkom mobile. Well when Telkom called me to say my contract is ending,in DEC 2017 i sent in my cancellation forms through to them, Jan the billed me, which was fine, Feb they billed me again, Marched they billed me again,and in April again and then i called them after 20min on the phone finally got hold of someone,they said my contract wasn't cancelled, it takes more than 3 months to cancel a contract with them! 3months how useless can you get, then i sent my forms to the guy at telkom, he gave me his email address, so i forward everything to him, then he said the money in April is a cancellation fee, and he said(which i have a recording of) this is the last amount you will pay Telkom. A week later i called Telkom and they confirmed my contract is cancelled, which i have proof of. In the middle of May i received an email from Telkom saying end of May the deducting money again off my account as a service fee??? they so useless they cant even do their jobs. everything i say i want to speak to a supervisor i get told, i cant.