Hi, @Daloyd .
To confirm, you’re having issues with using your debit card to complete purchases on multiple stores that are utilizing the Shopify platform, correct?
If this is the case, and if you haven’t already done so, I recommend reaching out to the respective stores directly. If the store is operating on our platform, they can check any failed payment attempts from their Shopify admin via the abandoned checkouts page. If an error message exists, they should be able to locate more information about the error and help clarify this for you.
They can also reach out to our live support team if need be, in case they require further assistance in checking the details of your payment attempt.