UNAUTHORISED DEBIT ORDER

I have a concern regarding my account. I cancelled my contract with you for the decoder on 10 September, and the decoder was returned on 29 September. After the cancellation, an amount of R299 was still debited on 25 September, but I was informed that the refund would take 7 to 14 days, which I eventually received on 25 October.

However, I noticed another debit of R299 was deducted yesterday, even though my contract was cancelled long ago. Why has this happened?

Please refund my money as soon as possible, as this situation is unfair and inconvenient. I would also appreciate an explanation to ensure this does not happen again.