Support
Email hearsay@pouchapps.com. It reaches a person, and it is the reply-to on every email the app sends, so replying to one of those works too.
What to include
Your store’s domain, and the order number if it is about one response.
If the question looks wrong on your storefront
Send a screenshot of the order confirmation page. Themes differ, and the page usually shows the cause.
Data requests
Same address. Uninstalling deletes the store’s data; ask if you want that confirmed in writing.