FCPU is normally really good at making things right, especially, when it's their screw up . . . as the fact of there being that ugly red sleeve holding everything together that's the smoking gun that the SATA power cable was never put back with the rest of the cables.
It's short, and with that heavy SATA plug on the one end, it likely fell off the work table, unnoticed, untill too late.
See how they do at taking responsibility and getting things sorted out before writing them off for future purchases.
Generall speaking, they are one of the "good guys" in the vendors' arena.