How to get refund information for our app via API

Question

We are publishing multiple games in the Windows Store and are looking to automate refund handling in an external server. Is there any web API that allows us to fetch all refunds for a specific app and time frame (e.g. all refunds for app X in the last 2 weeks)?

We saw that there's ways of doing this directly from within the app for the active user, but in our case it should be done on a backend system and by game, not by user.

Any help would be appreciated!