How can my union support me after being suspended?

Long story short I’m being suspended after rules were enforced and I keep breaking these rules, I’m in shift work and I never wait for my replacement because they always come in late so I always leave before they arrive. Ironically I’m the one being penalized in this case and not the people coming in late, I definitely know they’re pulling this now because me and a few others unionized, there’s other bs I can’t get into but it seems like they’re just trying their best to remove the unionized workers but I have no proof so it won’t benefit me.

I know that one person got fired over something but they were unionized so they got rehired. I have a feeling like it won’t help my case that I’ve been leaving when I want because it just looks bad, can the union help me get a job or prevent me from termination?