An email to fix an address or swap a size means a wait, while the order sits unfixed. Oops adds an Edit order button to the customer's account. In the window you set, they can fix the address, swap a size or colour, change quantity, remove an item or cancel. A lower total is refunded or held for approval; a higher one is invoiced by Shopify. Oops stops once anything ships, or it is cancelled or archived. It stores no name, address, email or phone, and needs new customer accounts.

• Customers fix the address, swap a size or colour, change the quantity or cancel.
• Shows Shopify's new total and the difference before the customer confirms.
• A lower total is refunded at once, or held for your approval first.
• An address checker blocks missing essentials and warns about PO boxes.
• A log of every change, unpaid balances, and requests waiting for approval.