Even if your card details were replaced or deleted, you can still receive a refund to your account.
If the merchant asks for the last four digits of the card, you can find this on the app*:
Go to Home
Select the transaction you want the refund for
Find the last 4 digits next to Card ending in
Once the merchant has sent your refund, it typically takes 5–10 working days for the money to arrive in your account.
*You can't find this on the website