CSA of baby father if not on birth certificate

Babys 8 months

Father only seen her 12 times I havnt stopped him.

He stopped direct debit we planned over a month ago.. bc he doesn't see her (we plan but he argues or can't make it or doesn't msg and just don't show up and we waiting around, or he works.

So can I get CSA if he not on certificate, don't plan on putting him on either