PSA: Call FN service if you recently made an online request and haven't heard back
I picked up a Reflex a couple weeks ago that suffers from the grouping-way-low issue (and before you blame the shooter, I had the same result lightly-supported, and no such issue with another small 9mm under the same conditions), so I submitted a support request online as FN's website directed. I heard nothing for almost two weeks, so I decided to call today and see what was up (1-800-635-1321), and they responded both immediately and helpfully.
I then asked if phone was just a better way to reach them for service in the future, and the tech I spoke with told me that because FN US just did some sort of switch-over of their electronic systems about two weeks ago (right when I submitted my initial request...) and were busy playing catch-up to get all the kinks worked out, recent e-requests may be falling through the cracks.
Tl;dr: if you recently sent an electronic service request to FN and haven't gotten a timely response, follow up by phone!