M.H.
I agree with the previous poster, pull her out of there as soon as possible. A childcare provider should not need to be told that your daughters diaper needs changing and you would like her clothes changed if she vomits on them. That is so basic, even a 16 year old babysitter should get that. You are paying her to be your daughters carer for the day and to leave her in same diaper for 8 hours is absolutely disgusting. I used to watch my friends daughter and didn't know her that well when I first started but I still treated her like my own, would even put her in the bath on the odd occasion she was sick.
This person is not attending to your daughters basic needs anywhere near adequately, get someone who will.