Go to the account page
Enter your registered email address - this is the email you used when creating your subscription
Click Continue
You'll receive a one-time verification code via email
Enter the code on the login screen
Select Subscriptions at the top of the page
Select the Edit products button
Select the Swap item button under the items you'd like to swap
Choose the item you'd like to swap with
Select the Confirm button to save your swap
Swap a product
Updated this week