Vodacom Paid-Up letter

Please assist me in obtaining a paid-up letter from Vodacom. I previously had a contract agreement with Vodacom and then I cancelled it in July 2022. 26 July 2022 I called Vodacom informing them of the intention to convert my number to pre-paid. They gave me an amount to be paid by 31 August 2022. I paid the stated amount on the 15th of August 2022 and then in September 2022 I called Vodacom to confirm cancellation of the contract. They confirmed that the contract is cancelled, and no amount is owing. Later after they started sending me invoices showing a billing amount which then I provided them the proof of payment and the ticket number to cancel the contract. They acknowledged the info provided and stopped the calling thereafter. I need a paid-up letter for this account as I paid Vodacom and informed them repeatedly that their debt is showing on my credit record. Please assist me with obtaining a paid-up letter it is two years since the contract was paid and cancelled. Regards,