I am having my wages garnished to pay my ex wife's lawyer fees. It is going to take 2 years. Can her lawyer charge me 1500 every 90 days to renew the garnishment? The court order says 9% annual interest? Help I'm desperate

Does the garnishment expire every 90 days?

Usually it runs the length of the award.

... Can her lawyer charge me 1500 every 90 days to renew the garnishment? ...

I'm having a hard time believing that renewing a writ is that complex. Seems like the templates could be re-used by simply plugging in a few updated figures and dates. What state are you in?

Take her back to family court, have garnishment papers prepared for the entire amount for 2 years that don't need to be "renewed"