Fix integration issues with Shopify/Amazon

Hi, we have a Shopify store both here in the U.K and also in the U.S. On the U.S site we have a few inventory issues that need fixing - possibly due to the way the items are listed via Shopify, using Codisto. We would like someone who has a good understanding of the working of both Amazon and Shopify to fix these errors.

We are also looking for help to boost the listings on the U.K Amazon store to increase sales, whether that's by improved SEO, keywords or by improving the design/outlook of the listings themselves.

Thank you.