9 year old hygiene

Someone help!! My 9 year old girl has poor hygiene and no matter what I do it doesn’t work. She refuses to brush her teeth, refuses to wash her hair, refuses to change underwear, and she doesn’t wipe when she goes to the bathroom. When I finally do get to wash her underwear it’s disgusting. There is always poop on her underwear. She started her “period” too. Luckily it has just been spotting/light for the two periods she has had so far, but I fear when she actually gets a real flow. I don’t know why she refuses to clean herself. Help!!!