This morning at work, i was using my headphone to communicate with my team at work, and a coworker come to me wanting to take my headphone without even asking, justifying it by his online training. I said that I am working with it and i can't shut down the call just to give him the headphone, but he kept insisting and insulting ( saying like crazy people and screaming on my face ) even though i rejected to give him the headphone.
What do you think i should do in this case ?