Professional Makeover for Demo Video

I have a short 2-D product-demonstration video that currently looks flat, poor, and nothing like the rest of our marketing materials. I need it transformed into a polished, on-brand piece that can sit confidently on our website and social channels... (Budget: $250 - $750 AUD, Jobs: Adobe Premiere Pro, After Effects, Animation, DaVinci Resolve, Motion Graphics, Video Editing, Video Post-editing, Video Production, Video Services, Visual Effects)