Not a Word

The last time Dad saw his beautiful daughters was June 19, 2022. It has been heart breaking not to be able to see them or talk to them. It has been almost 2.5 months. The eldest one has blocked Dad on her phone and the youngest one has stopped responding. Dad texts them everyday and tell them that He loves them. This is perhaps not sufficient. More actions are needed to break this pattern. Dad suggested to the Ex that they do counseling. So far no counseling. What else can Dad do?