Cancelled contract debit order

I am frustrated. My contract cancellation letter has still not been emailed as per your promise on my previous post. I asked for a cancellation last year Oct because I sold my vehicle . You got back to me Dec 15 to acknowledge the cancellation. Alas in the past 3 months you've deducted monthly installments for a devise I no longer have. I reversed the debit orders now you have the audacity to tarnish my credit record. I dont want a call from an agent I'd like a supervisor to explain why you continued to deduct the money. What is even odd is you stopped debiting my account beginning of 2023 and resumed again mid 2023. Can someone thoroughly investigate what happened with my account. Because I now want to report you to the ombudsman. Your consultants contradict themselves. They even told me you short staffed hence confirmation of cancellation was only sent in Dec. The promised cancellation confirmation for 2023 has not been sent.