Finchoice refusing to close my fully paid account and keep on adding charges

Settlement was requested in Aug last year and September everything was paid however due to the account still active it accumulated more interest and charges on a fully paid account and I ended up having to pay 600 in December since the 17th December 2025 I have been chasing finchoice to close my account and send me a paid up letter unfortunately my calls are not answered and I have sent more than 10 follow up emails without anyone attending to them I feel this is intentional inorder for finchoice to keep adding charges and interests on a fully paid account