Hey @Andy2003 - not great to hear if your bank details haven't been updated. Was this in regard to direct debit? If direct debit was set up, it will only go towards future bills that have not yet been generated. So if you have a pending bill when you set up direct debit, you'd need to pay it manually.
That being said, we can certainly double check this for you. Can you please send me a private message with the following info:
Are you the primary account holder: Y/N
Date of birth: