Should I speak with the teacher or director ?

Should I speak with teacher or director ? The teacher is gone at 3:30pm and I pick my 19 month old up at 4ish, so it’s the assistants that are messing up… we’ve been at this daycare for 9 months and this has never happened before. They did get a new assistant this past month

I picked up my daughter on Tuesday and she had a poop so the teacher took her to change before I got her . At home, I noticed the poop leaked in her pants , she was wearing the wrong diaper (size 4 instead of 6 and we provide diapers) and there was still poop in her parts. I didn’t like it, but I figured it was a one off and they rushed because I was already there.

Wednesday I picked her up and she had a poop diaper but it was whatever , they had changed her a half hour before, so it probably just happened . Changed her when I got home , it’s a 5 min drive

Thursday , she smelled like poop at pick up and there was no poop in her diaper but her pants had poop stains it … she had a bowel movement 30 mins prior, so she was in dirty pants for that amount of time.