Basically he will not acknowledge them. They split two years ago, he paid child support until the day the new girlfriend got pregnant and then he stopped and stopped responding to her messages.
Every month or so she sends a polite enough message asking him to sort this out, for the past 9 she's received nothing aside of the new girlfriend calling her a pschyo.
I honestly don't know what to say, she should give up really but equally why should she. He has a new baby, I'm not kidding timed to the day since his last payment.