My emotions are out of control and babysitting this little girl is driving me nuts because she…

My emotions are out of control and babysitting this little girl is driving me nuts because she constantly throws tantrums and cries over NOTHING she is three and everyone makes the excuse for her that she acts this way because she has crap parents... so what teach her how to behave now that she's away from her family, it's not my job im here as a charity and she's pushing me to the limit.