Caramel Clothing review for Evri

I downloaded this app to use for customer returns as I buy my Evri labels through Shopify Shipping. Unfortunately it doesn't link. The app is no more than bookmarking the Evri web address in your browser. If it could link to customer returns in Shopify so we could buy from the returns screen or even more brilliantly allow the customer to download the label themselves so we could deduct the label cost from the refund I would happily pay for the app.