I am in contempt of a court order to repay my mom's estate for money i spent how can they collect?

The court can issue an attachment that will be given over to the sheriff who will then serve it upon you. The attachment will freeze any assets you own, real or personal including any bank accounts. The attachment will be followed up by an execution and the sheriff can sieze and sell any property you own to pay the debt. The court could also transfer the matter to the criminal court division for prosecution.