By DOT regulations a semi trailer with a lose load in a cargo van is the load at least be secured with brass by the back doors if the doors are swing

If you were injured on the job, which one would have to assume from your post, your remedy for your injury is to make a worker's compensation claim for your injury with your employer's WC carrier. If you were not on the job at the time and this is a third party claim, one would need more information from you to better understand how the accident happened, and whether the cargo van driver or the caro door was faulty or if they were negligent for your injury.