Telkom trying to debit my account for a cancelled number

I cancelled *** on the 20th July 2022: Request Case Request Cancellation of service request REFERENCE ***5 Logged 28 Jul 2022

August was deducted and paid and I allowed that since I presume they have a 30 days cancellation notice - Telkom still trying to debit my account and says there is an additional "Payment Rejection Fee" of R202.70. I knew they would try to take money from my account *******ly so I blocked the debit order.

Please wake up and sort out my account - I will not allow you to take a further cent from me!