Urgent Dispute of Telkom Charges. Request for review and resolution

I am writing to dispute Telkom claiming that I owe them R907.96. Why is that so when I agreed to a cellphone contract for R139 on 30 July 2025 from Telkom Rewardsco agent who assured me that the old contract's debit order for R419 was ending on 31 July 2025 and this contract will only start debiting my account on 30 August 2025. So there will not be overlap.

I would appreciate if ICASA could resolve this and update Telkom and NuDebt to clear my name please. I have logged my complain to ICASA's website form and have not eve received acknowledgement.