How do I change my Direct Debit details? If you want to change your regular payment day or set up a new Direct Debit then you can do this in your online account. If you want to change your bank account please contact us as we're still working on making this available online. Related articles How do I amend my Direct Debit bank account? How do I contact you? How do I save my online account as an app to my phone? How do I set up a Direct Debit? My bank details have changed. What do I need to do?