Instructional Video Sync Upgrade

I have a four-minute instructional MP4 that already has a finished voice track, a script, and a rough-cut template video. What it lacks is that seamless link between what the viewer hears and what they see on screen... (Budget: $30 - $250 AUD, Jobs: Adobe Premiere Pro, After Effects, DaVinci Resolve, Final Cut Pro, Video Editing, Video Post-editing, Video Production, Video Services)