My daughter is not responding

 I wonder why my girl hasn't been responding my calls and now her phone's seem dead. It goes out straight to voicemail. I don't know what to think about them now. My girl don't seem to know how to say OK to me over the phone. It's hard now to make them follow me. The father's even ignoring my text and never responded. I keep saying I should come on weekends now but last time he responded they are not home he said. I miss my girls so much.