Incompetence at its best

On the 29th of March 2021 my broadband contract ***) came to an end and had requested that the number be converted to a prepaid number. On the 1st of April 2021 benefits were loaded and was billed R199.00 for it and on the 3rd the contract was terminated/cancelled as per Mbali Mgandela (eventhough according to her there was no request to cancel) from Telkom customer service. On the 9th I requested that she log a complaint for me, which she advised that she cannot log a call her manager will personally attend to it and provide me with feedback and to date I have not heard anything from Telkom. To make matters worse on the 1st of May 2021 I was billed R50.00 for the same contract***) for the same device subscription fee and R599.00 for a prepaid contract. On the invoices both line items do not have numbers associated to them but the debit orders went through on my account. Can I request that the total amount of 848 made of R199.00 + R50 + R599 be credited back to my account. This is incompetence at it's best as my credit score was almost impacted by this.