Unsuccessful on cancelling Vodacom Fibre

I called Vodacom on 27 November 2024 to cancel my Fibre, but they deducted money from my account in December and Jan.. I called again on 31 Jan to ask why it was not cancelled. They said they gonna log another request to withdraw, but at the end of February, they deducted again. I have checked my statement now, it says R599 is due for March. How is that possible when I cancelled my fibre account? This is the reference they provided me: SR***.