Thanks for trying our plugin!
Please refer to this article with information about setting up a product reviews XML feed for Google: https://cusrev.freshdesk.com/support/solutions/articles/43000483206-google-shopping-xml-product-review-feed
Should the feed be uploaded to google as a suplemental feed?
Regards
It sounds like you are trying to upload the feed with product reviews instead of a product feed.
Do you have a “product ratings” page in your Google Merchant Center account?
We haven’t heard from you for more than two weeks. For this reason, I’ll assume that either you are not interested in this question/problem anymore or it has been resolved. If this is not the case, please let us know and we’ll be happy to help.