How to file a claim for child support from ex-husband?

I have been divorced for two years now. My ex-husband has been hesitating to pay child support in the past two months saying that he has no money.

I would like to raise a claim for this but I would like to know what the consequences will be after the claim has gone through.

What does the UAE family law say? Also, I am worried that he might run out of the country, can I apply for a travel ban on him?

Please advise!