Blog-feed.xml appearing in search engine results - how to prevent?

About a year ago, I added the Wix Blog to my website to create a private space for members only (access managed through a third party). On the Wix blog main settings, and on every individual blog post, I have the “allow SEO to index” setting disabled.

However, in the source code for my home page, there is a reference to blog-feed.xml, which has the text and images for all of my posts! Bing shows this in search results for my business.

How/can I remove this reference from the source code of my home page? I don’t want search engines or private parties to be able to view it.

Getting the run around from Wix support.