Charged unreasonable fees, contract doesn't end after 24 month period

I was charged a R202 rejection fee for a charge I reversed in January after having been billed following my contract having ended in November last year already. I feel continuing to bill me on a month to month basis (having given me no warning this would happen) and despite me having phoned last year trying to end the contract early is **********. Burying things in the T's and C's where no one will even find them is not sufficient. But charging me a rejection fee two months after the fact (a rejection fee twice the debit amount) without ever having warned me this would happen is unacceptable. I have already paid way more than I ever should have to Telkom in being charged after my contract had expired, never having asked for an extension of the contract, and having fought to get the contract cancelled. (I had to phone up an insane amount of minutes since they kept losing my cancellation request, logged over the phone AND online multiple times).

I will take this to my bank or the ombudsman if I need to. You don't charge people without warning after they have fought tooth and nail to get the contract cancelled.