Can We Retroactively Attribute Sales To FB Ads? My Facebook Ad wasn't tracking correctly.

No, the revenue generated from that ad is already inside Wicked Reports.
We don't have the ability to retroactively attribute revenue to ads in this case.
You would have needed to have the tracking setup correctly for Wicked Reports to give you accurate data.
We're sorry that we cannot do this for you, but without any tracking, we'd have no way to attribute the revenue to a specific ad, even if you tell us which ad that was.
For more information on tracking Facebook Ads, please click here.