Divorce Support Forums: help!

I need some advice. I am the custodial parent, and my children (DD 11 - DS 12) are on vacation with their father. Almost 2 years ago my current husband and I have purchased a cell phone fr the kids to use so they can call us whenever they want.

DD called me on the first day in Florida and said that her father and his GF are fighting and that they are scared and might come home. I asked her what were her, her brother and GF's kids doing and she said watching TV. I told her to get all the kids outside to play and not to worry about it.

My ex called 1/2 hour later yelling at me saying how dare I call our DD when she is on vacation with him. I quickly stated she called me cause you were fighting with GF and she was nervous. He said that DD will not call me anymore.

The next day I called the cell phone and it went straight to voice mail. I called his cell phone and he didn't answer. So I sent him a text saying that I wanted to speak to my children and this text will be proof of that request. If he does not supply my children access to a phone to call me, then he will be held in contempt of court.

Amazingly, the children called me. I asked DD if the cell phone was dead again, and she said " No. Daddy broke it so I can't talk to you anymore". I was in shock.

How can he do that? Is there anything I can do? I did pay for this phone. I'm at a loss for words. What would you do?