Cell C - Debit Order still taken after contract cancelled - Bad Credit Record

I cancelled my Cell C contract 7 October 2021 and received an email confirming my cancellation. I received another email on 6 November 2022 confirming my cancellation. It even shows in my Cell C app that I am prepaid. End of October a debit order for R179 was taken from my account. I left if as I thought this was perhaps my last payment. On 1 December another debit order for R179 was taken from my account. I reversed the money back into my account. I phoned their customer service, emailed them, but I was sent from one department to the next. They just could not resolve the issue. I received a statement showing I am R179 in arrears and then they added R70 for "Failed Debit Order Penalty Fee". I made a payment for R428 in January 2022 just to keep my name clear. Then MBD phoned me on 26 January 2022 to say I owe Cell C money and I must pay. I explained that I cancelled the contract and sent all the proof to them. My credit report now shows two missed payments which is unacceptable. I have not received any communication from Cell C to say that my contract is now cancelled. What about the money I paid them? Are they going to pay me back? Are they going to clear my my credit record?