How do I file child abuse charges against my daughter’s daycare?

I think my daughter is being physically abused at daycare, maybe emotionally too. She is developmentally delayed and doesn’t talk. She does have a lot of functioning issues and her behavior can get aggressive at times. She’s coming home from the daycare provider with cuts and bruises and they say she is doing it to herself. She doesn’t hurt herself here at home and I’m concerned that the daycare can’t handle her and may be hitting or restraining her when she acts out. I called the Indiana Department of Child Services hotline and they said they would investigate, but I haven’t heard back. What do I need to go to get the daycare investigated and if they are abusing my daughter, how do I get them charged?