Telkom still debiting amount after contract cancelled

I cancelled my Telkom Mobile Service in the beginning of August. My reference number: *** : ***0 An agent called me to confirm this and also confirmed that the last debit order will be deducted 31/08/2021. This morning a debit order went off of my account with the same amount that used to be debited for the contract that I ALREADY CANCELLED with confirmation! THIS is why I cancelled my contract with Telkom and will never ever have a contract or any service from them again!