The seller must make a claim to the shipping / carrier company ... if you say parts obsolete it may help to get a full refund and keep your item ...
Had this problem with an hp sig gen, the rackmount handles where damaged and the front panel was bent and the power switch was broken, i did got a full refund and kept the sig gen
Carefully un-bent the panel, removed the rackmount handles (dont need them), got a new powerswitch, works very well up to this day
good luck