Window Leak Repair Service (NOLA)

Have a window in the house that leaks during heavy rain events. We took the trim off the outside a while back. Inspected and replaced some of the flashing although everything looked ok. Sprayed water on it for ~20-25 minutes and nothing happened. Previously, was able to spray water on it and water started coming in after about 10 minutes. I guess what we did didn't actually fix anything because it leaked heavily whenever it rained a lot a week or two ago. Don't want to mess with this anymore myself. Looking to pay for someone to fix. Any recommendations?