Telkom still billing after cancelation

My 24 months contract (which I was not happy with as I believed was false advertising) came to an end in June. Thereafter R40 was debited from my account which I reversed. I went to Brooklyn mall store to cancel and was told I needed to pay the rejection fee of R245 and was debited the following month. Last month I was invoiced with R0 however I got this month's invoice stating that R245 will be debited from my account. Telkom please stop with your nonsense. I do not owe you anything