All refunds to customers shopping on your Shopify site need to be submitted through the Shopify platform.
Once you’ve refunded your customer for an item or order, you can request to receive a credit from Endless Aisles. In order to do this, simply fill out our credit request form. All submissions are audited by our team, and only claims that are covered by our Credit Policy receive a credit.
What is Endless Aisles' full Credit Policy?? See this FAQ here: https://endlessaisles.zendesk.com/hc/en-us/articles/115000321814-What-is-Endless-Aisles-credit-policy-