Honestly this is way too unfair, you hire someone for accidentally bumping into you, instead of giving them a choice of paying you back through money or anything of the like you force them to work through threats. They mess up because of the lack of explanations and now are scolded by a senior, honestly you should've at least explained the situation to her and said senior instead of just throwing her in front of a bunch of people and asking her to improv without any information. There's a lot of cute girls that can be hired, just apply make up, there's no point forcing someone who's both inexperienced and not even motivated to work.