Spousal Support and Alimony: Can You Withhold Alimony Over a Child Custody Issue

My question involves a marriage in the state of:NY
My ex spouse is refusing to pay court ordered alimony with explanation that i have to stop borrowing my son’s computer. He alleges that attorney says it is a valid reason to withhold alimony.
Can i apply for income execution for non-payment?

Spousal Support and Alimony: Can You Withhold Alimony Over a Child Custody Issue