Extreme unhappiness

I am a current employee of Amazon and I am extremely unhappy. I had to face not one but two sexual harassment cases alone as well as them hiring someone who has previously harassed me before he became an employee. I shrugged that off in that it was off property. He has threatened to harass me at work and come to my job and harass me. What will stop him now I have been hurt so many times at work? I have had things fallen on my foot and they still send me back. I have twisted my ankle and fallen off a ladder and they don’t care. I have severe anxiety and PTSD and they don’t care. I hope my story will somehow be heard. Thank you for your time.