The box most likely landed flat on one side, thus distributing broad impact which would limit typical external deformations. And moreso if the contents were double-boxed, and the type of internal packing foam used. Besides coils, some x-over capacitors are pretty sizeable, and if merely glued onto the PC boad, wouldn't take much "sheer" inertia to dislodge them. Seems odd that these heavier componts weren't secured with cable-ties as well.
You could always send it back the mfr for repair, and they would probably fix, or replace, it for free once they know what happened (I'm almost sure they would). Sometimes, the "turnaround" time can be more than you'd like, but I guess your options really boil down to a new board's replacement cost vs the hassle of sending yours back in.
If either of those options are an issue, can you solder, or have friends that know how? This is really quite a simple fix, and with some hot-glue, silicone, or epoxy to re-mount the components, could easily be repaired.
