If a customer purchases Route by mistake, a merchant can refund the Route premium in Shopify, as long as the order is still in pre-shipment, with the following steps.
1. Search the order in Shopify
2. Select "Refund"
3. Move the quantity of Route from "0" to "1"
4. Select "Refund" on the right-hand side
5. The refund will be sent to the customer, and the merchant credited. Evidence of the refund will appear in both the Route Dashboard and Shopify order: