We've had issues with content on the product page be flagged. They give you a vague suggestion as to why its been flagged, and the annoying thing is that the background system clearly knows what it is that has flagged as an issue - but getting amazon to tell you is impossible.

This sounds similar - it took us weeks to get someone to actually tell us what the problem was, and in the end, it was nothing to do with the reason it got flagged - but as you are dealing with bots and algorithms, getting someone to see sense was impossible.

Sadly, if they have asked you to remove the item and the deal is running soon, you will likely have to remove it.