You can change your card details by following these steps:
On the Website:
Step 1 Log into your Gousto account and head to 'My Gousto', then click into ‘Account details’
Step 2 Click ‘edit’ under the payment details section, input your new card details and click save!
On the App:
Step 1 Log into your Gousto app and tap ‘Profile’
Step 2 Tap into account details
Step 3 Tap into 'My payment details'
Step 4 Tap onto the card number and input your new card details, then tap ‘Update’!
Please note that it's not currently possible to change your payment method from card to PayPal. Once you switch from PayPal to card, you won’t be able to revert back to PayPal.