How to claim under the Direct Debit Guarantee
In the event that an error is made by the organisation or your bank or building society, you are entitled to a full and immediate refund from your bank of the amount paid.
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.
Full details of the Direct Debit Guarantee.