Hey there Rose,
I have also have had the same issue when updating my bank payout option. I tried removing the old account but kept insisting i enter my old card details which i have no access to whatsoever. Can you please help remove my old bank card to update a new one. Thank you.
my store email address is: https://pure-angels.myshopify.com/
I can't find a Shopify store attached to your forums email address, therefore I can't authenticate you to help. For security reasons, please don't ever provide us with your store email address publicly, this could lead to your account being compromised. Instead, please contact our support and we will be able to authenticate you to get this escalated for you. Online chat is the fastest method. You can also reach out by email, or on Twitter or Facebook Messenger.
I sent an email to the account owner email address for both of your accounts. Please reply to that so I can escalate for you.