I would encourage you to help the seller/shipper as much as you can, they are really the one in control here. When it comes to goods and services quality can suffer when the task is challenging as shipping bikes can be. Having just gone through this the other thing that I consider a requirement is the insurance, it worked and it paid but I still have to fix the bike, hopefully it turns out good. So at the end of the day it may be expensive, so is damage with no recourse.