Seems as if you want to report the company. First
prepare to find a new job.
Document
everything Dates, times, who you spoke with, what action was taken and what you were told to do. Was it fixed then, later or never or don't know. Take some pictures but be careful. Some companies have policies against cameras on premises. After you have several weeks worth of safety complaints (or even before) start contacting your State enforcement agencies. State DOT, State police (if they do commercial vehicle enforcement), State weighmaster, local law enforcement, even the local TV news (makes good "serve the community"
PR) better if they are truck haters.
Remember the whole time you are doing this your butt is still exposed and you could be subject to fines if caught on the road with serious violations.
Good Luck