Someone that is confident needs to open the box and look at the suspension - one or more of the springs may have been unseated, so it may be straightforward to fix, or may be more serious.
If that confident person is not you, then the Dealer would be that person.
Power-down and unplug first!
It needs transit bolts inserted to lock the suspension, turn upside-down and undo the feet with an Allen-key, undo the single big case bolt, turn over right-side and carefully remove the transit-bolts and slide-off the case.
Once inspected and fixed if it is just re-seating the springs, then reverse the process to reassemble.
Since this is the only Naim product that Naim designed to allow the user to remove the case to be able to tweak the crossover, hopefully I'm not in trouble describing the process - otherwise remove what I've said!
Let us know if you get it fixed.
DB.
