I am a part-timer. My backbones have got injured for a couple of days after one of my bosses required me to move ups and downs 10 heavy boxes (over 13 kg each boxes, I am just 50 kg) for her. Now she denied she had "asked" (actually it's "forced") me to do it for her. There were no witnesses at that time. Now no compensation no paid time off. What can I do????
Thank you very much .