I have been working at my current employer for almost a year now and although I’m not a designated trainer(we don’t have any), I continue to be given trainees, I’m on number three. They all are older then me by a minimum of 10 years. They all ignore me when I try explaining to them how to do something and why it need to be done while also telling them that if they can find a better way to do it that they are more then welcome if it doesn’t effect my portion of the work. Today I had enough of my third trainer who has lied to me about her mistakes, lied to my team lead about her mistakes and even going so far to tell me that I and another coworker made the mistake or told her to do it when we did not. She ignored me then 20 minutes later was talking back to me when I told her how something needed to be done. How do I make my company understand that they cannot give these crazy trainees that ignore me.