Use Direct debit guarantee in a dispute, or whatever it’s called.
I contacted my bank & money refunded promptly. 4 payments to a energy co I’d left some time ago.
see:How do I claim under a Direct Debit guarantee?
Simply contact your bank or building society. They are responsible for refunding the money – even if the original error was made by the organisation collecting the payment. But remember, if you receive a refund you are not entitled to, you must pay it back when the organisation asks you to.
How to claim – Direct Debithttps://www.directdebit.co.uk › direct-debit-explained